Here’s food for thought.
At my work place in Jerusalem they were offering an introductory course in Arabic for anyone interested, and I signed up. We had our first introductory lesson last week, and it was surprising how similar are the learning skills needed for Welsh and Arabic. No, the languages themselves are totally and utterly different. One Celtic, one Semitic. No connection that I know of. But some aspects are common to both. They include regional variations, substantial but predictable vowel variations, and huge differences between spoken and formal language. This threw off some of my coworkers. I had no problem! Been there, done it. So I guess that SSiW is helping to build learning tools by teaching recognition of characteristics that are common to more than one group of languages. Diddorol.
I wonder if other members of the Forum have noticed language-building skills that are universal, or at least not limited to one group of languages?
By the way, the lessons are being taught by a native Arabic-speaker using the Ulpan/Wlpan method that will be familiar to some readers here.