Hi,
For each language, create:
- Filtering typology rule stating 'exclude recipients with this language not set'
- A copy of default typology, with the above rule added
- A delivery template with the above typology set
Have users use the right template for the right language, as an additional safeguard against error.
NB this is still at the delivery level, afaik there is no way to secure at the recipient level.
Thanks,
-Jon