Check the resource manager for a language pack for your language, if it does not exist yet you can start translating it yourself.
goto
Appearance -> Languages
click "create new language"
Title: Hindi
(enter other relevant info to your region)
Then go to
Appearance -> Phrases
and then edit the phrases relevant to what you want changed
(example changing the 'phrase text' for members will display whatever you replace that with wherever that phrase is called like in the navigation tab for the members. )
Which links can't you change? All of the navigation tabs are in phrases so if you change the phrase they'll update. Make sure you have chosen your new language.