The most important part of the manual is the methodsynopsis. Keeping these up-to-date would be nice and can be done by anyone of any language. Here are a couple options:
a) Check: Create a script that checks/compares the methodsynopsis between en/ and translations: a) Number of parameters b) Optional vs. required c) Types
b) Use en/ only: Use the en/ methodsynopsis for all translations
I assume (a) is preferred as translators translate parameter names but maybe that shouldn't be the case.
It is a lot nicer to translate parameter names, and some translations do so. Some revcheck like script could do the checks quite fine, although it involves some XML processing.
Goba