SAP Note 18566 - SPELL - Digits 30, 40-49 wrong in English

Symptom:

Key words: F110, RFFOD__S, RFFOUS_C, SPELL.
The digits in words for values 30 and 40 through 49 have been translated incorrectly in English (thrity instead of thirty and fourty instead of forty).

Cause and prerequisites

Incorrect table entries in table T015Z.

Solution
The error has been corrected for all new installations, but the upgrade/release procedure cannot correct the error in existing installations. You must therefore correct the table entry in the customer system:

Transaction SM31 Maintain table T015Z (press to confirm view screen).Set argument to Language E, Unit 3.
Now change the entry 30 from THRITY to THIRTY and
for the range 40 through 49, change FOURTY to FORTY.
Then press F11 in the view maintenance to save.