If you put a label text that contains spaces to any component, like an edit box, the Localization creates a key with spaces, but doesn't translate.
For example, my edit box originally has the label "Cargo o Puesto". When I "synchronize all" in localization, it creates a key "cargo o puesto". I put the strings for "English" and "Spanish" languages and run the project, but no matter what language I choose, it shows only "cargoopuesto" at the page (as shown, no spaces nor capital letters).
I must change the key to just "cargo" and put [%cargo%] in the component label for it to work.
Workaround: don't use labels containing spaces if you are going to use localization.