Finnish has good correspondence between written and spoken form. This is achieved with extra letters compared to latin and not using some letters. German alrea

Finnish has good correspondence between written and spoken form. This is achieved with extra letters compared to latin and not using some letters. German already had the extras: Ö and Ä. C and Q are not used, instead it's basically always K. There are no spelling bees in Finland. Everything that is said can only be spelled in one way. Everything that is written can only be spoken one way. Estonian has Ō in addition because they really have one more wovel. A latinized Russian should have a different character for each s-like character like it's now in cyrillic. Also, everybody should look at English and French spelling as something definitely NOT to do. Spanish is also good but they are actually close to latin so it's no surprise the latin alphabet also works. German is not so great as the match between spoken and written is quite loose. Both wovels and consonants change with context.