• Daylight: donri
• Eldritch Blast: bacmakfa ("basch-mack-fa")
• Feather Fall: pimlu
• Fireball: bolfagri (not "fragi"— fa as fire)
• Firebolt: danfagri
• Invisibility: nonselji'u (apostrof uttalas som h på di gamles språk)
• Knock: reggle (Swedish approx: "reggel")
• Light and Light-related spells: frotz (Swedish note: not frots. The inhuman insectile zzz of di gamle will not respond.)
• Mage Hand: xance (Swedish approx: "sjantje", like in sjuttio tjugo or sjö-tjänare)
• Sleep: sipni
• Speak with Animals: nitfol
• Spider Climb: pell fosk
• Teleport: xyzzy
• Unseen Servant: nalvi'ase'u (Swedish approx: "nal viha sehu")

More to come…

As your DM tells you components write them down in a way that you can say them—sound is more important than spelling when it comes to verbial components.