Wondering about my google analytics visitor languages. It shows de and de-de.
Is there any difference between them, if yes what do they mean? Is there a possability to get them all together in one language?
Well, I don't know how to merge them into Google Analytics, but I can answer the first question.
de_de are (obsiously) the same. They are Language tags.
deis a Language subtag
de-deis a Region subtag.
A few examples of language tags:
fr: French language,
en-AU: English language, as written and spoken in Australia,
az-Latn-IR, Azeri language, written in the Latin script, as used in Iran.
deis for German language
de-deis for Germain language as written and spoken in Germany.
This could sound weird, but there is also
fr-fr for example.
Couldn't find the exact match, but according to Microsoft there are differences between the German language spoken in various areas. Such as German Standard vs German Austria.
It doesn't answer your question completely but hopefully it brings you a little closer to the truth.