yóyes thel málelh means ‘my late father was working’‘. Some speakers would say tel málelh.

yóyes thel málelh means ‘my late father was working’‘. Some speakers would say tel málelh.
Li te Wólich… means ‘at Wahleach…’.
Thel málelh means ‘my late father’. Some speakers would say tel málelh.
Mál means ‘father’. You can also spell this word má:l (the colon indicates a slightly longer vowel, but the difference is not significant with this word).
Yóyes means ‘working’. It is the ‘-ing‘ (‘progressive’) form of yó:ys – ‘to work’.
Wolích is a place name. Several places now bear this name, but in her stories Elizabeth appears to be referring to a whistle stop along the railway tracks on Seabird Island.
Swéltel is the general term for a ‘net’. You can use this for any kind of net (there are also other words for specific kinds of nets).