Reading gmail in other languages

I know the standard ROM only comes with English and Spanish support by default.

Note, this wont affect the email content, as my phone is setup for English and I receive emails in Spanish all the time. Also, my son uses his in English, but he receives email in French all the time.

To get the full Android OS operating in French, you have to change the locale from whatever you have now (normally en_US) to French for Canada (fr_CA), French for Belgium (fr_BE), French for Switzerland (fr_CH) or French for France (fr_FR).

I know the MoDaCo ROMs include a setting to change locales directly.
There's also an app on the market to change the locales on the phone.

Attached the code to the app in the Market.

I know for sure the support for a lot of non-Latin languages is included in Gingerbread.

Some non-Latin are supported in FroYo, as Chinese, Japanese, Korean, and Russian.

The AOSP includes a lot of other locales strings. I am not sure if alternative sources like Cyanogen also include all the locales.