Earlier quoted context omitted.
55% of population has Spanish as their mother tongue, but that's not necessarily what they speak now. Is there any poll showing what they actually speak daily?
55% mother/habitual tongue. In the above link (official data, from an official source) is explained in detail.
This is not the same thing. My mother tongue is not my (current) habitual tongue. I don't see where the report shows the habitual tongue spoken.