Translatron
Use different languages directly in your <html> code and let translatron make the versions for each language.
Specify the available languages in the <html> tags lang attribute. use the l attribute to mark a tag as specific for this language.
Example
<html lang="en,de">
<head>
<title l="en">The Title</title>
<title l="de">Der Titel</title>
</head>
<body>
<p>
<lang l="en">English content</lang>
<lang l="de">Deutscher Inhalt</lang>
</p>
</body>
</html>translatron -l de -l en test.html test.*.html
This will generate the files test.de.html and test.en.html containing
<html lang="en">
<head>
<title>The Title</title>
</head>
<body>
<p>
English content
</p>
</body>
</html>and
<html lang="de">
<head>
<title>Der Titel</title>
</head>
<body>
<p>
Deutscher Inhalt
</p>
</body>
</html>