hi,
i have found a bug in 4.2.5 .
i have reproduced on apex.oracle.com
https://apex.oracle.com/pls/apex/f?p=4350
workspace : SRH
user :test
pwd: test
i install the Sample Application :
Sample Forms and Grid Layout (formerly Sample Tabular Form)
in the Globalization panel ,i change the Application Language Derived From to Browser (use browser language preference)
on my browser i change the langage to french

i add a row on the second tab (tabular form)

enter DUPONT as name and when i apply changes , i have the error validations(ok) but i have the "Current tabular form data is too old" in french

if i set my bowser language to English

i have the correct validation failed screen

best regards
jean marc