fix: minor spelling and wording changes for en and de (#2096)

Minor spelling and wording changes

I went through some of english and german localizations to correct or add minor things.

Added `invalid-tag-name` to json. Which also means it should be translated elsewhere.

web/src/components/CreateTagDialog.tsx

@@ -56,7 +56,7 @@ const CreateTagDialog: React.FC<Props> = (props: Props) => {
 
   const handleSaveBtnClick = async () => {
     if (!validateTagName(tagName)) {
-      toast.error("Invalid tag name");
+      toast.error(t("tag-list.invalid-tag-name"));
       return;
     }