I'm not really sure about this, but the main language of this site seems to be english (I'm not a native speaker myself). I've just posted a question regarding alleged english translations of a german author. All links to websites I could give were in german. If only 1% of readers could actually read them, should I rather leave them out to not offend people that don't speak german?
You should feel free to link to sources in any language. It would be helpful to pull relevant quotes from the text into your answer/question and translate them. People can always pass the page through one of many web page translation services across the web.
If some people are offended by other languages and cultures, we don't want them here anyway.