[sebst]

Some words I spoke seem not to be recognized, even though my pronunciation should not be that far away.

Then I clicked on "TEA" to see if there is some guidance... It was. According to the computer voice the right pronunciation of "TEA" is "T-E-A" rather than "tea". So, I guess, some word patterns are not correct in the system?

[diminish]

Thanks for the invaluable feedback.

Click on any text and Google web speech synthesis is used to pronounce that word in American English. Maybe the pronunciation is not perfect. Btw are you native ? if so or not do you speak American english accent or other?

[sebst]

No, not a native speaker. I would consider my accent to be more British than American, but that should not make such a difference for easy words like "Wrist", "Fist", ... which gave me -1 points while I got a near 100 score on an accidental cough ;)

[diminish]

Omg, Do you remember which word was understood as cough?

[sebst]

I'm afraid, I cannot remember, but I guess it was in one of the first sections, so maybe "wrist"…?