Your edo purposely did not teach her kids Somali which is surprising as fob Somali women tend to feel more comfortable speaking af Somali. Where are the kids when she is talking on the phone or when relatives come over ect. Who is mostly at home? She clearly only spoke to them in English. If she spoke to them in Somali from when they were babies they would know. But she is the one that choose to speak to them in English.
Kids pick up on languages whilst they're in the womb. Even as newborns they can differentiate their mum's language from others. Forget specific languages, it is mothers that teach babies how to talk, full stop. Any father that ends up teaching his children af Somali especially if he is in a traditional marriage in which he mostly works and the mum is spending more time is incredibly commendable. The reality is that fathers don't spend the same amount of time with their children.
The hooyo is the primary caregiver, the first teacher and instructor. We have unfortunate cases of full Somali kids living in Somali areas with Somali relatives not knowing how to speak Somali because the mum keeps on talking to them in English, especially when they're below the age of 5. Those women purposely didn't make an effort and this will be an issue for this generation. Forget mixed kids, full Somalis born from Western Somali mums and dads now have that issue. I have young cousins who live in Somali populated areas and their kids Somali is atrocious! These young mums keep on talking in English.
I'm surprised you feel comfortable talking about a woman (she was a fob but educated) you don't know, she did try teach those kids somali when they were younger but since they weren't surrounded by their somali family or community they didn't really pick up the language. Kids spend more time with their parents when they're the age 6 and younger so unless they have other somali speaking kids to play with those skills will depreciate. It's also one of the reason you see a lot of indhoyar women complaining that their children neither speak the language or relate to their side of the culture.
The thing with women passing down the language and culture is that it's not just the mother herself it's her mother (grandmother) and female relatives who help raise those kids that really make those kids learn the language and that doesn't happen much if you live in a suburb surrounded by cadaans. People are confusing the traditional pre-industrial way of raising children with the modern nuclear family.
As evidenced by that girl speaking somali that well and her stedad being somali so I'll go out on a limb and say she most likely lives in a somali community. There are a lot of fobs in scandinavia hence the ones who grow up there tend to speak the language better than the ones in other parts of the diaspora except the odd dhaqan celis here and there.
These days most couples can't afford stay at home parents so unless your keeping your child near qaraabo or a somali community they won't be speaking the language very much other than a word here and there.
I noticed half Somalis with Somali mothers have a greater likelihood of marrying Somalis than half Somalis with (qabils, aka fathers). Of course, neither group is beholden to any community, and most of them marry out again, but it's just a trend I've noticed lately.
From what I've seen the only half somalis who do marry somalis are almost always the ones who grew up in a xaafad with other somalis. rip lol if you think your reer shisheeye will ever marry a somali if they live away from them.