Dec() does not work when using different language OS

Dec() does not work when using different language OS:

Using PB 12.5, OS English and French, DBParm: DecimalSeperator = '.'

Database Driver is automatically able to understand the decimal separator and parse number properly.

Non-Issue:

Numbers are stored as numbers in database.

- running French OS where decimal separator is comma

- read the number from database. e.g. 1.50

- have value of 1,50 - correct

Issue:

Numbers stored as string in database.

- running French OS where decimal separator is comma

- read the string from database. e.g. 1.50

- call Dec(1.50) returns 0 (since decimal separator is comma) - wrong

- call Dec(1,50) returns 1,50 (since decimal separator is comma) - correct

I am looking for any solutions.

Thanks