Note: if you do not wish to have content for options 3-4, just replace the default value with a blank value.
Locize also contains all the default text including:
These rarely require changing except when they don't fit the action context or locale (e.g. postal code vs zip code; MP vs MEP vs MSP).
For new languages they need checking as they are initially added via automated machine translation. Ask PostBug support to add new languages and which translators and editors to assign each new language to.