By Default WebADI doesn't work in all the languages. If a WebADI Custom Integrator is created in one language (English), it doesn't work for other languages (Spanish).
To resolve the above issue:
1. Please run following Sql query to synchronize the tables $BNE_TOP/admin/sql/BNENLINS.sql
Note : If the script is not found in above location you may find it in $BNE_TOP/sql folder
2. From the AD Administration main menu, choose the Maintain Applications Database Objects menu, and select the "Maintain the multi-lingual tables" task.
Note: This step could take from a few minutes to a few hours to run, depending on the number of active languages in your database.
3. Clear Cache and bounce Apache