Well, in American if you can figure it out
The notes in tenor clef are in exactly the same spots as in treble clef. So the note
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is
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(G is F).
The problem comes because you have too many flats or too few sharps in the key signature (and they are in odd positions). Imagine the key signature to have two fewer flats or two more sharps and pretend they are where they should be for treble clef.
Another issue is some of the accidentals.
What looks like C flat is actually C natural. What looks like C natural is actually C sharp.
Same goes for F. What looks like F flat is actually F natural. What looks like F natural is actually F sharp.
If it really drives you crazy, make a copy of the music and mark up the "wrong" accidentals (they are actually right for Tenor Clef) and put a proper G clef and key signature on the left side.
For a Bb treble player, tenor clef is actually a lot easier than bass clef.