Does the source say that the children in Trevi o study Basque Yes it does You even go on to answer that question yourself Los ni os estudian en euskera there are ikastolas in Trevi o So there you go The kids there study in Basque Now it is clear from other sources that a fair number of residents of Trevi o were born in lava or elsewhere in the Basque country They surely send their children to the ikastolas That s pure guesswork on your part See WP SYNTH Do not combine material from multiple sources to reach or imply a conclusion not explicitly stated by any of the sources And how many purely local people do the same Why are the people who live there not local people Why are their kids who were born there not local If people who live there study in Basque then that s a clear linguistic link regardless of whether they meet your definition of local or not From the source we don t know perhaps none Again pure guesswork And do you think I m addressing Valenciano that that can be summarized as a linguistic link I don t need to make that call The source has already made it The source summarises it as a linguistic link