Hi there!
I'd like to charge $15 USD for each language for make sure 100% high quality translation by a native translators.
We are the team of professional native Chinese, Deutsch, French, Hindi, Italian, Japanese, Korean, Polish, Russian, Spanish translators/Proofreaders of this website with 8 years of experience. We can perfectly translate your Software Interface into Chinese, Deutsch, French, Hindi, Italian, Japanese, Korean, Polish, Russian, Spanish from English.
You can see an example of one of those projects in my portfolio here:
https://www.freelancer.com/u/eTranslators?w=f&ngsw-bypass=#/
Looking forward to hearing from you soon.
Best regards,
Dr. Jobayer Hossain