diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index dd390c3..8dbc517 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,13 +4,30 @@
     <option name="autoReloadType" value="ALL" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="d5f54382-616d-41b2-b8f9-53d04e37d644" name="Changes" comment="" />
+    <list default="true" id="d5f54382-616d-41b2-b8f9-53d04e37d644" name="Changes" comment="init">
+      <change afterPath="$PROJECT_DIR$/go.mod" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/thousands.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+    </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
+  <component name="FileTemplateManagerImpl">
+    <option name="RECENT_TEMPLATES">
+      <list>
+        <option value="Go File" />
+      </list>
+    </option>
+  </component>
   <component name="GOROOT" url="file://$USER_HOME$/Downloads/software/go1.24.3" />
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+  </component>
+  <component name="MarkdownSettingsMigration">
+    <option name="stateVersion" value="1" />
+  </component>
   <component name="ProjectId" id="2yEXSRkzWX5OSblFIfKjT32AMYm" />
   <component name="ProjectViewState">
     <option name="autoscrollFromSource" value="true" />
@@ -19,19 +36,26 @@
   </component>
   <component name="PropertiesComponent"><![CDATA[{
   "keyToString": {
+    "DefaultGoTemplateProperty": "Go File",
     "RunOnceActivity.ShowReadmeOnStart": "true",
     "RunOnceActivity.go.formatter.settings.were.checked": "true",
     "RunOnceActivity.go.migrated.go.modules.settings": "true",
     "RunOnceActivity.go.modules.go.list.on.any.changes.was.set": "true",
     "WebServerToolWindowFactoryState": "false",
     "go.import.settings.migrated": "true",
-    "last_opened_file_path": "/var/www/GoProjects/oldperl/go-thousands"
+    "last_opened_file_path": "/var/www/GoProjects/oldperl/go-thousands",
+    "node.js.detected.package.eslint": "true",
+    "node.js.selected.package.eslint": "(autodetect)"
   }
 }]]></component>
   <component name="SpellCheckerSettings" RuntimeDictionaries="0" Folders="0" CustomDictionaries="0" DefaultDictionary="application-level" UseSingleDictionary="true" transferred="true" />
   <component name="TypeScriptGeneratedFilesManager">
     <option name="version" value="3" />
   </component>
+  <component name="VcsManagerConfiguration">
+    <MESSAGE value="init" />
+    <option name="LAST_COMMIT_MESSAGE" value="init" />
+  </component>
   <component name="VgoProject">
     <settings-migrated>true</settings-migrated>
   </component>
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..906ff99
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module gitport.de/oldperl/go-thousands
+
+go 1.24
diff --git a/thousands.go b/thousands.go
new file mode 100644
index 0000000..dbb434a
--- /dev/null
+++ b/thousands.go
@@ -0,0 +1,102 @@
+package thousands
+
+import (
+	"fmt"
+	"strings"
+)
+
+func Separate(Number interface{}, language ...string) (string, error) {
+
+	switch Number.(type) {
+	case int:
+	case int8:
+	case int16:
+	case int32:
+	case int64:
+	case float32:
+	case float64:
+
+	default:
+		return "", fmt.Errorf("no valid number format")
+	}
+
+	formattedNumber := fmt.Sprintf("%.2f", Number)
+
+	if len(language) < 1 {
+		language[0] = "en"
+	}
+
+	switch language[0] {
+	case "de":
+
+		formattedNumber = strings.ReplaceAll(formattedNumber, ",", ".")
+		numberLength := len(formattedNumber)
+
+		dec := ""
+
+		if strings.Index(formattedNumber, ".") != -1 {
+			dec = formattedNumber[strings.Index(formattedNumber, ".")+1 : numberLength]
+			formattedNumber = formattedNumber[0:strings.Index(formattedNumber, ".")]
+
+		}
+
+		for i := 0; i <= numberLength; i = i + 4 {
+
+			a := formattedNumber[0 : numberLength-i]
+			b := formattedNumber[numberLength-i : numberLength]
+			formattedNumber = a + "." + b
+
+		}
+
+		if formattedNumber[0:1] == "." {
+			formattedNumber = formattedNumber[1:numberLength]
+		}
+
+		if formattedNumber[numberLength-1:numberLength] == "." {
+			formattedNumber = formattedNumber[0 : numberLength-1]
+		}
+
+		if dec != "" {
+			formattedNumber = formattedNumber + "," + dec
+		}
+
+		return formattedNumber, nil
+
+	case "en":
+
+		formattedNumber = strings.ReplaceAll(formattedNumber, ",", "")
+		numberLength := len(formattedNumber)
+
+		dec := ""
+
+		if strings.Index(formattedNumber, ".") != -1 {
+			dec = formattedNumber[strings.Index(formattedNumber, ".")+1 : numberLength]
+			formattedNumber = formattedNumber[0:strings.Index(formattedNumber, ".")]
+
+		}
+
+		for i := 0; i <= numberLength; i = i + 4 {
+
+			a := formattedNumber[0 : numberLength-i]
+			b := formattedNumber[numberLength-i : numberLength]
+			formattedNumber = a + "," + b
+
+		}
+
+		if formattedNumber[0:1] == "," {
+			formattedNumber = formattedNumber[1:numberLength]
+		}
+
+		if formattedNumber[numberLength-1:numberLength] == "," {
+			formattedNumber = formattedNumber[0 : numberLength-1]
+		}
+
+		if dec != "" {
+			formattedNumber = formattedNumber + "." + dec
+		}
+
+		return formattedNumber, nil
+	}
+
+	return formattedNumber, nil
+}