Langid Lcid

Hi,

To explain a little bit, I have an application that uses an external database.
The user must be able to localize the content of this database.

So there is a tool that present all the public strings from the database and give him the ability to make the translation of the string.

Now I have a big doubt about LANGID and LCID.
When a translation is done by the end user I associate it a LCID.

Is it OK to use LCID to localize the translation or LANGID is better?

Because my big doubt is, between 2 different PCs will a same LCID refer to exactly the same "language"?

Thanks!