Startup Idea - Developer spelling and grammar checking done right

Startup idea for anyone who wants it (no idea if it has done, but I haven't heard of it).

Spell and grammar check git committed code (GitHub/Bitbucket maybe). Needs to understand

- String literals

- Comments

- HTML - content, alt, title, ...

- iPhone's XIB (XML but with some built-in heuristic rules)

- XML

- Localisation e.g. "Center" vs "Centre"

- Various languages

- OCR Images for typos

Has company/project/developer aware white/black word lists but also understands line numbers in files and how they change with commits for ignoring specific phrases/words.

Maybe could use VoiceOver hooks to also check the final product for iOS.

I'd pay $5/month personally - enterprises would pay a lot IMHO. But perhaps I'm the only developer who finds english harder than coding.