There are a few more approaches, one could be step-2 like: mapping dutch graphemes to english graphemes and submit that to the fallback. Had some good results with that and works on the fly.
Yes, this is also a very good idea which exploits the fact that Dutch spelling is way more standard than English spelling.
And, finally, never trust IH K S P EH K T AH D B AH HH EY V Y ER.
S AA R IY,
AY
K AH N
OW N L IY
SH EY V
W AH N
Y AE K
AH T
AH
T AY M.