The base english file is attached.
Be sure not to change the words/parts/fields that look like variable names!
Obviously text that is in pictures (mostly just the main menu) will need to be done differnetly.
The mod for this is already made, as is the german translation.
Syntax for those who are curious:
element <name> <text (optional)>
Selects the current element called <name>, if <text> is supplied it will set the elements text
child <number> <text (optional)>
Selects Nth child of the current element, if <text> is supplied it will set the elements text.
<positive integer> <text>
Temporarly switches focus to the Nth child of the current element and sets its text
Since the mod will check if elements exist before setting their text, its not a bad idea (for me) to include some of the most popular mods as well as default guis.