Where to find information about common iPhone/iPad/Mac terms such as "Contacts"

Hi, I am looking for information regarding common terms, names and phrases used for Apple software.

I work in software development and localization, and I often have to translate and determine set words, but it can be very difficult searching if there are already set terms already, and confirming the spelling, etc. is correct.

Does anybody have some kind of index of iPhone/iPad/Mac terms such as standard app names, commands, requests, etc?

Any help is much appreciated.

Thank you