tpl/lang: Add new localized versions of lang.FormatNumber etc.

Fixes #8820

16 files changed, 385 insertions, 59 deletions

diff --git a/common/htime/time_test.go b/common/htime/time_test.go
index 383027755..e8aec0153 100644
--- a/common/htime/time_test.go
+++ b/common/htime/time_test.go
@@ -28,7 +28,7 @@ func TestTimeFormatter(t *testing.T) {
 	june06 = june06.Add(7777 * time.Second)
 
 	c.Run("Norsk nynorsk", func(c *qt.C) {
-		f := NewTimeFormatter(translators.Get("nn"))
+		f := NewTimeFormatter(translators.GetTranslator("nn"))
 
 		c.Assert(f.Format(june06, "Monday Jan 2 2006"), qt.Equals, "onsdag juni 6 2018")
 		c.Assert(f.Format(june06, "Mon January 2 2006"), qt.Equals, "on. juni 6 2018")
@@ -36,7 +36,7 @@ func TestTimeFormatter(t *testing.T) {
 	})
 
 	c.Run("Custom layouts Norsk nynorsk", func(c *qt.C) {
-		f := NewTimeFormatter(translators.Get("nn"))
+		f := NewTimeFormatter(translators.GetTranslator("nn"))
 
 		c.Assert(f.Format(june06, ":date_full"), qt.Equals, "onsdag 6. juni 2018")
 		c.Assert(f.Format(june06, ":date_long"), qt.Equals, "6. juni 2018")
@@ -51,7 +51,7 @@ func TestTimeFormatter(t *testing.T) {
 	})
 
 	c.Run("Custom layouts English", func(c *qt.C) {
-		f := NewTimeFormatter(translators.Get("en"))
+		f := NewTimeFormatter(translators.GetTranslator("en"))
 
 		c.Assert(f.Format(june06, ":date_full"), qt.Equals, "Wednesday, June 6, 2018")
 		c.Assert(f.Format(june06, ":date_long"), qt.Equals, "June 6, 2018")
@@ -66,7 +66,7 @@ func TestTimeFormatter(t *testing.T) {
 	})
 
 	c.Run("English", func(c *qt.C) {
-		f := NewTimeFormatter(translators.Get("en"))
+		f := NewTimeFormatter(translators.GetTranslator("en"))
 
 		c.Assert(f.Format(june06, "Monday Jan 2 2006"), qt.Equals, "Wednesday Jun 6 2018")
 		c.Assert(f.Format(june06, "Mon January 2 2006"), qt.Equals, "Wed June 6 2018")
@@ -88,7 +88,7 @@ func BenchmarkTimeFormatter(b *testing.B) {
 	})
 
 	b.Run("Localized", func(b *testing.B) {
-		f := NewTimeFormatter(translators.Get("nn"))
+		f := NewTimeFormatter(translators.GetTranslator("nn"))
 		b.ResetTimer()
 		for i := 0; i < b.N; i++ {
 			got := f.Format(june06, "Monday Jan 2 2006")
@@ -99,7 +99,7 @@ func BenchmarkTimeFormatter(b *testing.B) {
 	})
 
 	b.Run("Localized Custom", func(b *testing.B) {
-		f := NewTimeFormatter(translators.Get("nn"))
+		f := NewTimeFormatter(translators.GetTranslator("nn"))
 		b.ResetTimer()
 		for i := 0; i < b.N; i++ {
 			got := f.Format(june06, ":date_medium")
diff --git a/docs/content/en/content-management/image-processing/index.md b/docs/content/en/content-management/image-processing/index.md
index 76679717e..e2e964154 100644
--- a/docs/content/en/content-management/image-processing/index.md
+++ b/docs/content/en/content-management/image-processing/index.md
@@ -134,7 +134,7 @@ Or individually access EXIF data with dot access, e.g.:
 {{ end }}
 ```
 
-Some fields may need to be formatted with [`lang.NumFmt`]({{< relref "functions/numfmt" >}}) function to prevent display like `Aperture: 2.278934289` instead of `Aperture: 2.28`.
+Some fields may need to be formatted with [`lang.FormatNumberCustom`]({{< relref "functions/lang" >}}) function to prevent display like `Aperture: 2.278934289` instead of `Aperture: 2.28`.
 
 #### Exif fields
 
diff --git a/docs/content/en/functions/NumFmt.md b/docs/content/en/functions/lang.md
index 9b51f597f..7b810c9be 100644
--- a/docs/content/en/functions/NumFmt.md
+++ b/docs/content/en/functions/lang.md
@@ -1,10 +1,8 @@
 ---
-title: lang.NumFmt
-description: "Formats a number with a given precision using the requested `negative`, `decimal`, and `grouping` options. The `options` parameter is a string consisting of `<negative> <decimal> <grouping>`."
-godocref: ""
-date: 2017-02-01
-publishdate: 2017-02-01
-lastmod: 2017-08-21
+title: lang
+package: lang
+description: "TODO.."
+date: 2021-07-28
 categories: [functions]
 keywords: [numbers]
 menu:
@@ -12,18 +10,13 @@ menu:
     parent: "functions"
 toc: false
 signature: ["lang.NumFmt PRECISION NUMBER [OPTIONS [DELIMITER]]"]
-workson: []
-hugoversion:
-relatedfuncs: []
-deprecated: false
-draft: false
-aliases: []
-comments:
+aliases: ['/functions/numfmt/']
+type: 'template-func'
 ---
 
 The default options value is `- . ,`.  The default delimiter within the options
 value is a space.  If you need to use a space as one of the options, set a
-custom delimiter.
+custom delimiter.s
 
 Numbers greater than or equal to 5 are rounded up. For example, if precision is set to `0`, `1.5` becomes `2`, and `1.4` becomes `1`.
 
diff --git a/docs/content/en/functions/time.md b/docs/content/en/functions/time.md
index 6c7f5aec6..e1f24a40b 100644
--- a/docs/content/en/functions/time.md
+++ b/docs/content/en/functions/time.md
@@ -19,6 +19,7 @@ deprecated: false
 aliases: []
 ---
 
+
 `time` converts a timestamp string with an optional default location into a [`time.Time`](https://godoc.org/time#Time) structure so you can access its fields:
 
 ```
diff --git a/docs/data/docs.json b/docs/data/docs.json
index d0edcb67f..9925a57e6 100644
--- a/docs/data/docs.json
+++ b/docs/data/docs.json
@@ -1677,6 +1677,9 @@
       "caches": {
         "_merge": "none"
       },
+      "cascade": {
+        "_merge": "none"
+      },
       "frontmatter": {
         "_merge": "none"
       },
@@ -1745,7 +1748,7 @@
           "keepDocumentTags": true,
           "keepEndTags": true,
           "keepQuotes": false,
-          "keepWhitespace": false
+          "keepWhitespace": true
         },
         "css": {
           "keepCSS2": true,
@@ -1756,7 +1759,8 @@
           "keepVarNames": false
         },
         "json": {
-          "precision": 0
+          "precision": 0,
+          "keepNumbers": false
         },
         "svg": {
           "precision": 0
@@ -3898,14 +3902,52 @@
         }
       },
       "lang": {
-        "Merge": {
-          "Description": "",
-          "Args": null,
+        "FormatAccounting": {
+          "Description": "FormatAccounting returns the currency reprecentation of number for the given currency and precision\nfor the current language in accounting notation.",
+          "Args": [
+            "precision",
+            "currency",
+            "number"
+          ],
           "Aliases": null,
-          "Examples": null
+          "Examples": [
+            [
+              "{{ 512.5032 | lang.FormatAccounting 2 \"NOK\" }}",
+              "NOK512.50"
+            ]
+          ]
         },
-        "NumFmt": {
-          "Description": "NumFmt formats a number with the given precision using the\nnegative, decimal, and grouping options.  The `options`\nparameter is a string consisting of `\u003cnegative\u003e \u003cdecimal\u003e \u003cgrouping\u003e`.  The\ndefault `options` value is `- . ,`.\n\nNote that numbers are rounded up at 5 or greater.\nSo, with precision set to 0, 1.5 becomes `2`, and 1.4 becomes `1`.",
+        "FormatCurrency": {
+          "Description": "FormatCurrency returns the currency reprecentation of number for the given currency and precision\nfor the current language.",
+          "Args": [
+            "precision",
+            "currency",
+            "number"
+          ],
+          "Aliases": null,
+          "Examples": [
+            [
+              "{{ 512.5032 | lang.FormatCurrency 2 \"USD\" }}",
+              "$512.50"
+            ]
+          ]
+        },
+        "FormatNumber": {
+          "Description": "FormatNumber formats number with the given precision for the current language.",
+          "Args": [
+            "precision",
+            "number"
+          ],
+          "Aliases": null,
+          "Examples": [
+            [
+              "{{ 512.5032 | lang.FormatNumber 2 }}",
+              "512.50"
+            ]
+          ]
+        },
+        "FormatNumberCustom": {
+          "Description": "FormatNumberCustom formats a number with the given precision using the\nnegative, decimal, and grouping options.  The `options`\nparameter is a string consisting of `\u003cnegative\u003e \u003cdecimal\u003e \u003cgrouping\u003e`.  The\ndefault `options` value is `- . ,`.\n\nNote that numbers are rounded up at 5 or greater.\nSo, with precision set to 0, 1.5 becomes `2`, and 1.4 becomes `1`.\n\nFor a simpler function that adapts to the current language, see FormatNumberCustom.",
           "Args": [
             "precision",
             "number",
@@ -3914,19 +3956,19 @@
           "Aliases": null,
           "Examples": [
             [
-              "{{ lang.NumFmt 2 12345.6789 }}",
+              "{{ lang.FormatNumberCustom 2 12345.6789 }}",
               "12,345.68"
             ],
             [
-              "{{ lang.NumFmt 2 12345.6789 \"- , .\" }}",
+              "{{ lang.FormatNumberCustom 2 12345.6789 \"- , .\" }}",
               "12.345,68"
             ],
             [
-              "{{ lang.NumFmt 6 -12345.6789 \"- .\" }}",
+              "{{ lang.FormatNumberCustom 6 -12345.6789 \"- .\" }}",
               "-12345.678900"
             ],
             [
-              "{{ lang.NumFmt 0 -12345.6789 \"- . ,\" }}",
+              "{{ lang.FormatNumberCustom 0 -12345.6789 \"- . ,\" }}",
               "-12,346"
             ],
             [
@@ -3935,6 +3977,32 @@
             ]
           ]
         },
+        "FormatPercent": {
+          "Description": "FormatPercent formats number with the given precision for the current language.\nNote that the number is assumbed to be percent.",
+          "Args": [
+            "precision",
+            "number"
+          ],
+          "Aliases": null,
+          "Examples": [
+            [
+              "{{ 512.5032 | lang.FormatPercent 2 }}",
+              "512.50%"
+            ]
+          ]
+        },
+        "Merge": {
+          "Description": "",
+          "Args": null,
+          "Aliases": null,
+          "Examples": null
+        },
+        "NumFmt": {
+          "Description": "",
+          "Args": null,
+          "Aliases": null,
+          "Examples": null
+        },
         "Translate": {
           "Description": "Translate returns a translated string for id.",
           "Args": [
diff --git a/docs/layouts/template-func/page.html b/docs/layouts/template-func/page.html
new file mode 100644
index 000000000..f08018e4f
--- /dev/null
+++ b/docs/layouts/template-func/page.html
@@ -0,0 +1,54 @@
+{{ $pkg := .Params.package}}
+{{ $funcs := index site.Data.docs.tpl.funcs $pkg }}
+
+{{  range $k, $v := $funcs }}
+  {{ if $v.Description }}
+    {{ $func := printf "%s.%s" $pkg $k }}
+    <h2>
+      <a class="header-link" href="#{{ $func | anchorize | safeURL }}">
+        <svg class="fill-current o-60 hover-accent-color-light" height="22px" viewBox="0 0 24 24" width="22px" xmlns="http://www.w3.org/2000/svg">
+          <path d="M0 0h24v24H0z" fill="none"/>
+          <path d="M3.9 12c0-1.71 1.39-3.1 3.1-3.1h4V7H7c-2.76 0-5 2.24-5 5s2.24 5 5 5h4v-1.9H7c-1.71 0-3.1-1.39-3.1-3.1zM8 13h8v-2H8v2zm9-6h-4v1.9h4c1.71 0 3.1 1.39 3.1 3.1s-1.39 3.1-3.1 3.1h-4V17h4c2.76 0 5-2.24 5-5s-2.24-5-5-5z"/>
+        </svg>
+      </a>
+      {{ $func }}
+    </h2>
+    {{ with  $v.Description }}
+      <p class="f4 lh-copy">
+        {{ . |  $.RenderString | safeHTML }}
+      </p>
+    {{ end }}
+    <h4 class="minor mb3 pt2 primary-color-dark">
+      Syntax
+    </h4>
+    <div class="f5 mb4 ph3 pv2 bg-light-gray" style="border-left:4px solid #0594CB;">
+      {{ $pkg }}.{{ $k }}
+      {{ with $v.Args }}
+        <span class="ttu">
+          {{ delimit $v.Args ", "}}
+        </span>
+      {{ end }}
+      <span></span>
+    </div>
+    {{ if $v.Examples }}
+      <h4 class="minor mb3 pt2 primary-color-dark">
+        Examples
+      </h4>
+    {{ end }}
+    {{ range $v.Examples }}
+      {{ $input := index . 0 }}
+      {{ $result := index . 1 }}
+      {{ $example := printf "%s ---> %s" $input $result }}
+
+      {{ highlight $example "go-html-template" "" }}
+    {{ end }}
+    {{ with $v.Aliases }}
+      <h4 class="minor mb3 pt2 primary-color-dark">
+        Aliases
+      </h4>
+      <p>
+        {{ delimit . ", "}}
+      </p>
+    {{ end }}
+  {{ end }}
+{{ end }}
diff --git a/go.mod b/go.mod
index aa2eb76db..5ceaaca1e 100644
--- a/go.mod
+++ b/go.mod
@@ -12,7 +12,7 @@ require (
 	github.com/bep/gitmap v1.1.2
 	github.com/bep/godartsass v0.12.0
 	github.com/bep/golibsass v1.0.0
-	github.com/bep/gotranslators v0.0.0-20210726170149-50377fc92c80
+	github.com/bep/gotranslators v0.2.0
 	github.com/bep/gowebp v0.1.0
 	github.com/bep/tmc v0.5.1
 	github.com/cli/safeexec v1.0.0
diff --git a/go.sum b/go.sum
index 31c16e234..491bad20e 100644
--- a/go.sum
+++ b/go.sum
@@ -136,6 +136,8 @@ github.com/bep/golibsass v1.0.0 h1:gNguBMSDi5yZEZzVZP70YpuFQE3qogJIGUlrVILTmOw=
 github.com/bep/golibsass v1.0.0/go.mod h1:DL87K8Un/+pWUS75ggYv41bliGiolxzDKWJAq3eJ1MA=
 github.com/bep/gotranslators v0.0.0-20210726170149-50377fc92c80 h1:FuOr7TE02FmHwf0HbOzfN0UyQfHoZd1R3PVuYduFU6U=
 github.com/bep/gotranslators v0.0.0-20210726170149-50377fc92c80/go.mod h1:/tUOv4Jdczp4ZggwBAQriNN97HsQdG1Gm+yV0PsIGD8=
+github.com/bep/gotranslators v0.2.0 h1:GW0mGPivOY4drd4HwWpn44HXBo5zc5iHdDJZj3yWb/k=
+github.com/bep/gotranslators v0.2.0/go.mod h1:fbo6ptvCVYarnHjBm4BvOJX0o18VEvA0slN7xKvqXzc=
 github.com/bep/gowebp v0.1.0 h1:4/iQpfnxHyXs3x/aTxMMdOpLEQQhFmF6G7EieWPTQyo=
 github.com/bep/gowebp v0.1.0/go.mod h1:ZhFodwdiFp8ehGJpF4LdPl6unxZm9lLFjxD3z2h2AgI=
 github.com/bep/tmc v0.5.1 h1:CsQnSC6MsomH64gw0cT5f+EwQDcvZz4AazKunFwTpuI=
diff --git a/hugolib/language_test.go b/hugolib/language_test.go
index da8ecd22b..1de422620 100644
--- a/hugolib/language_test.go
+++ b/hugolib/language_test.go
@@ -79,3 +79,52 @@ name = "foo-a"
 
 	})
 }
+
+func TestLanguageNumberFormatting(t *testing.T) {
+
+	b := newTestSitesBuilder(t)
+	b.WithConfigFile("toml", `
+baseURL = "https://example.org"
+
+defaultContentLanguage = "en"
+defaultContentLanguageInSubDir = true
+
+[languages]
+[languages.en]
+timeZone="UTC"
+weight=10
+[languages.nn]
+weight=20
+	
+`)
+
+	b.WithTemplates("index.html", `
+
+FormatNumber: {{ 512.5032 | lang.FormatNumber 2 }}
+FormatPercent: {{ 512.5032 | lang.FormatPercent 2 }}
+FormatCurrency: {{ 512.5032 | lang.FormatCurrency 2 "USD" }}
+FormatAccounting: {{ 512.5032 | lang.FormatAccounting 2 "NOK" }}
+FormatNumberCustom: {{ lang.FormatNumberCustom 2 12345.6789 }}
+
+# We renamed this to FormatNumberCustom in 0.87.0.
+NumFmt: {{ -98765.4321 | lang.NumFmt 2 }}
+
+	
+`)
+	b.WithContent("p1.md", "")
+
+	b.Build(BuildCfg{})
+
+	b.AssertFileContent("public/en/index.html", `
+FormatNumber: 512.50
+FormatPercent: 512.50%
+FormatCurrency: $512.50
+FormatAccounting: NOK512.50
+FormatNumberCustom: 12,345.68
+        
+NumFmt: -98,765.43
+`,
+	)
+
+	b.AssertFileContent("public/nn/index.html", "FormatNumber: 512,50\nFormatPercent: 512,50\u00a0%\nFormatCurrency: 512,50\u00a0USD\nFormatAccounting: 512,50\u00a0kr")
+}
diff --git a/langs/language.go b/langs/language.go
index 6f39848cf..758729c25 100644
--- a/langs/language.go
+++ b/langs/language.go
@@ -97,11 +97,11 @@ func NewLanguage(lang string, cfg config.Provider) *Language {
 
 	localCfg := config.New()
 	compositeConfig := config.NewCompositeConfig(cfg, localCfg)
-	translator := translators.Get(lang)
+	translator := translators.GetTranslator(lang)
 	if translator == nil {
-		translator = translators.Get(cfg.GetString("defaultContentLanguage"))
+		translator = translators.GetTranslator(cfg.GetString("defaultContentLanguage"))
 		if translator == nil {
-			translator = translators.Get("en")
+			translator = translators.GetTranslator("en")
 		}
 	}
 
diff --git a/tpl/cast/docshelper.go b/tpl/cast/docshelper.go
index a3cc26de5..9a5d55b3d 100644
--- a/tpl/cast/docshelper.go
+++ b/tpl/cast/docshelper.go
@@ -18,6 +18,7 @@ import (
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/deps"
 	"github.com/gohugoio/hugo/docshelper"
+	"github.com/gohugoio/hugo/langs"
 	"github.com/gohugoio/hugo/resources/page"
 	"github.com/gohugoio/hugo/tpl/internal"
 )
@@ -25,10 +26,12 @@ import (
 // This file provides documentation support and is randomly put into this package.
 func init() {
 	docsProvider := func() docshelper.DocProvider {
+		cfg := config.New()
 		d := &deps.Deps{
-			Cfg:                 config.New(),
+			Cfg:                 cfg,
 			Log:                 loggers.NewErrorLogger(),
 			BuildStartListeners: &deps.Listeners{},
+			Language:            langs.NewDefaultLanguage(cfg),
 			Site:                page.NewDummyHugoSite(newTestConfig()),
 		}
 
diff --git a/tpl/lang/init.go b/tpl/lang/init.go
index 520eccb88..beb148ff6 100644
--- a/tpl/lang/init.go
+++ b/tpl/lang/init.go
@@ -15,6 +15,7 @@ package lang
 
 import (
 	"github.com/gohugoio/hugo/deps"
+	"github.com/gohugoio/hugo/langs"
 	"github.com/gohugoio/hugo/tpl/internal"
 )
 
@@ -22,7 +23,7 @@ const name = "lang"
 
 func init() {
 	f := func(d *deps.Deps) *internal.TemplateFuncsNamespace {
-		ctx := New(d)
+		ctx := New(d, langs.GetTranslator(d.Language))
 
 		ns := &internal.TemplateFuncsNamespace{
 			Name:    name,
@@ -34,16 +35,45 @@ func init() {
 			[][2]string{},
 		)
 
-		ns.AddMethodMapping(ctx.NumFmt,
+		ns.AddMethodMapping(ctx.FormatNumber,
 			nil,
 			[][2]string{
-				{`{{ lang.NumFmt 2 12345.6789 }}`, `12,345.68`},
-				{`{{ lang.NumFmt 2 12345.6789 "- , ." }}`, `12.345,68`},
-				{`{{ lang.NumFmt 6 -12345.6789 "- ." }}`, `-12345.678900`},
-				{`{{ lang.NumFmt 0 -12345.6789 "- . ," }}`, `-12,346`},
-				{`{{ -98765.4321 | lang.NumFmt 2 }}`, `-98,765.43`},
+				{`{{ 512.5032 | lang.FormatNumber 2 }}`, `512.50`},
 			},
 		)
+
+		ns.AddMethodMapping(ctx.FormatPercent,
+			nil,
+			[][2]string{
+				{`{{ 512.5032 | lang.FormatPercent 2 }}`, `512.50%`},
+			},
+		)
+
+		ns.AddMethodMapping(ctx.FormatCurrency,
+			nil,
+			[][2]string{
+				{`{{ 512.5032 | lang.FormatCurrency 2 "USD" }}`, `$512.50`},
+			},
+		)
+
+		ns.AddMethodMapping(ctx.FormatAccounting,
+			nil,
+			[][2]string{
+				{`{{ 512.5032 | lang.FormatAccounting 2 "NOK" }}`, `NOK512.50`},
+			},
+		)
+
+		ns.AddMethodMapping(ctx.FormatNumberCustom,
+			nil,
+			[][2]string{
+				{`{{ lang.FormatNumberCustom 2 12345.6789 }}`, `12,345.68`},
+				{`{{ lang.FormatNumberCustom 2 12345.6789 "- , ." }}`, `12.345,68`},
+				{`{{ lang.FormatNumberCustom 6 -12345.6789 "- ." }}`, `-12345.678900`},
+				{`{{ lang.FormatNumberCustom 0 -12345.6789 "- . ," }}`, `-12,346`},
+				{`{{ -98765.4321 | lang.FormatNumberCustom 2 }}`, `-98,765.43`},
+			},
+		)
+
 		return ns
 	}
 
diff --git a/tpl/lang/init_test.go b/tpl/lang/init_test.go
index 82def5523..61d7b5047 100644
--- a/tpl/lang/init_test.go
+++ b/tpl/lang/init_test.go
@@ -16,6 +16,9 @@ package lang
 import (
 	"testing"
 
+	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/langs"
+
 	"github.com/gohugoio/hugo/htesting/hqt"
 
 	qt "github.com/frankban/quicktest"
@@ -29,7 +32,9 @@ func TestInit(t *testing.T) {
 	var ns *internal.TemplateFuncsNamespace
 
 	for _, nsf := range internal.TemplateFuncsNamespaceRegistry {
-		ns = nsf(&deps.Deps{})
+		ns = nsf(&deps.Deps{
+			Language: langs.NewDefaultLanguage(config.New()),
+		})
 		if ns.Name == name {
 			found = true
 			break
diff --git a/tpl/lang/lang.go b/tpl/lang/lang.go
index 4e6c9c70a..0cf448caa 100644
--- a/tpl/lang/lang.go
+++ b/tpl/lang/lang.go
@@ -20,6 +20,8 @@ import (
 	"strconv"
 	"strings"
 
+	translators "github.com/bep/gotranslators"
+	"github.com/go-playground/locales"
 	"github.com/pkg/errors"
 
 	"github.com/gohugoio/hugo/deps"
@@ -27,15 +29,17 @@ import (
 )
 
 // New returns a new instance of the lang-namespaced template functions.
-func New(deps *deps.Deps) *Namespace {
+func New(deps *deps.Deps, translator locales.Translator) *Namespace {
 	return &Namespace{
-		deps: deps,
+		translator: translator,
+		deps:       deps,
 	}
 }
 
 // Namespace provides template functions for the "lang" namespace.
 type Namespace struct {
-	deps *deps.Deps
+	translator locales.Translator
+	deps       *deps.Deps
 }
 
 // Translate returns a translated string for id.
@@ -57,14 +61,81 @@ func (ns *Namespace) Translate(id interface{}, args ...interface{}) (string, err
 	return ns.deps.Translate(sid, templateData), nil
 }
 
-// NumFmt formats a number with the given precision using the
+// FormatNumber formats number with the given precision for the current language.
+func (ns *Namespace) FormatNumber(precision, number interface{}) (string, error) {
+	p, n, err := ns.castPrecisionNumber(precision, number)
+	if err != nil {
+		return "", err
+	}
+	return ns.translator.FmtNumber(n, p), nil
+}
+
+// FormatPercent formats number with the given precision for the current language.
+// Note that the number is assumbed to be percent.
+func (ns *Namespace) FormatPercent(precision, number interface{}) (string, error) {
+	p, n, err := ns.castPrecisionNumber(precision, number)
+	if err != nil {
+		return "", err
+	}
+	return ns.translator.FmtPercent(n, p), nil
+}
+
+// FormatCurrency returns the currency reprecentation of number for the given currency and precision
+// for the current language.
+func (ns *Namespace) FormatCurrency(precision, currency, number interface{}) (string, error) {
+	p, n, err := ns.castPrecisionNumber(precision, number)
+	if err != nil {
+		return "", err
+	}
+	c := translators.GetCurrency(cast.ToString(currency))
+	if c < 0 {
+		return "", fmt.Errorf("unknown currency code: %q", currency)
+	}
+	return ns.translator.FmtCurrency(n, p, c), nil
+}
+
+// FormatAccounting returns the currency reprecentation of number for the given currency and precision
+// for the current language in accounting notation.
+func (ns *Namespace) FormatAccounting(precision, currency, number interface{}) (string, error) {
+	p, n, err := ns.castPrecisionNumber(precision, number)
+	if err != nil {
+		return "", err
+	}
+	c := translators.GetCurrency(cast.ToString(currency))
+	if c < 0 {
+		return "", fmt.Errorf("unknown currency code: %q", currency)
+	}
+	return ns.translator.FmtAccounting(n, p, c), nil
+}
+
+func (ns *Namespace) castPrecisionNumber(precision, number interface{}) (uint64, float64, error) {
+	p, err := cast.ToUint64E(precision)
+	if err != nil {
+		return 0, 0, err
+	}
+
+	// Sanity check.
+	if p > 20 {
+		return 0, 0, fmt.Errorf("invalid precision: %d", precision)
+	}
+
+	n, err := cast.ToFloat64E(number)
+	if err != nil {
+		return 0, 0, err
+	}
+	return p, n, nil
+}
+
+// FormatNumberCustom formats a number with the given precision using the
 // negative, decimal, and grouping options.  The `options`
 // parameter is a string consisting of `<negative> <decimal> <grouping>`.  The
 // default `options` value is `- . ,`.
 //
 // Note that numbers are rounded up at 5 or greater.
 // So, with precision set to 0, 1.5 becomes `2`, and 1.4 becomes `1`.
-func (ns *Namespace) NumFmt(precision, number interface{}, options ...interface{}) (string, error) {
+//
+// For a simpler function that adapts to the current language, see FormatNumberCustom.
+func (ns *Namespace) FormatNumberCustom(precision, number interface{}, options ...interface{}) (string, error) {
 	prec, err := cast.ToIntE(precision)
 	if err != nil {
 		return "", err
@@ -162,6 +233,13 @@ func (ns *Namespace) NumFmt(precision, number interface{}, options ...interface{
 	return string(b), nil
 }
 
+// NumFmt is deprecated, use FormatNumberCustom.
+// We renamed this in Hugo 0.87.
+// Deprecated: Use FormatNumberCustom
+func (ns *Namespace) NumFmt(precision, number interface{}, options ...interface{}) (string, error) {
+	return ns.FormatNumberCustom(precision, number, options...)
+}
+
 type pagesLanguageMerger interface {
 	MergeByLanguageInterface(other interface{}) (interface{}, error)
 }
diff --git a/tpl/lang/lang_test.go b/tpl/lang/lang_test.go
index 3b3caeb62..782a0a69a 100644
--- a/tpl/lang/lang_test.go
+++ b/tpl/lang/lang_test.go
@@ -3,15 +3,16 @@ package lang
 import (
 	"testing"
 
+	translators "github.com/bep/gotranslators"
 	qt "github.com/frankban/quicktest"
 	"github.com/gohugoio/hugo/deps"
 )
 
-func TestNumFormat(t *testing.T) {
+func TestNumFmt(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)
 
-	ns := New(&deps.Deps{})
+	ns := New(&deps.Deps{}, nil)
 
 	cases := []struct {
 		prec  int
@@ -49,12 +50,12 @@ func TestNumFormat(t *testing.T) {
 		var err error
 
 		if len(cas.runes) == 0 {
-			s, err = ns.NumFmt(cas.prec, cas.n)
+			s, err = ns.FormatNumberCustom(cas.prec, cas.n)
 		} else {
 			if cas.delim == "" {
-				s, err = ns.NumFmt(cas.prec, cas.n, cas.runes)
+				s, err = ns.FormatNumberCustom(cas.prec, cas.n, cas.runes)
 			} else {
-				s, err = ns.NumFmt(cas.prec, cas.n, cas.runes, cas.delim)
+				s, err = ns.FormatNumberCustom(cas.prec, cas.n, cas.runes, cas.delim)
 			}
 		}
 
@@ -62,3 +63,45 @@ func TestNumFormat(t *testing.T) {
 		c.Assert(s, qt.Equals, cas.want)
 	}
 }
+
+func TestFormatNumbers(t *testing.T) {
+
+	c := qt.New(t)
+
+	nsNn := New(&deps.Deps{}, translators.GetTranslator("nn"))
+	nsEn := New(&deps.Deps{}, translators.GetTranslator("en"))
+	pi := 3.14159265359
+
+	c.Run("FormatNumber", func(c *qt.C) {
+		c.Parallel()
+		got, err := nsNn.FormatNumber(3, pi)
+		c.Assert(err, qt.IsNil)
+		c.Assert(got, qt.Equals, "3,142")
+
+		got, err = nsEn.FormatNumber(3, pi)
+		c.Assert(err, qt.IsNil)
+		c.Assert(got, qt.Equals, "3.142")
+	})
+
+	c.Run("FormatPercent", func(c *qt.C) {
+		c.Parallel()
+		got, err := nsEn.FormatPercent(3, 67.33333)
+		c.Assert(err, qt.IsNil)
+		c.Assert(got, qt.Equals, "67.333%")
+	})
+
+	c.Run("FormatCurrency", func(c *qt.C) {
+		c.Parallel()
+		got, err := nsEn.FormatCurrency(2, "USD", 20000)
+		c.Assert(err, qt.