farmOs v1 migrate v2 - issue with taxonomy

Thank you for taking this up. This is the result

root@d7b4acb2949e:/opt/drupal# drush migrate:messages farm_migrate_taxonomy_plant_type
 -------------- ------------------- ------- ----------------------------------- 
  Source ID(s)   Destination ID(s)   Level   Message                            
 -------------- ------------------- ------- ----------------------------------- 
  11                                 1       [taxonomy_term: 11]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  23                                 1       [taxonomy_term: 23]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  25                                 1       [taxonomy_term: 25]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  31                                 1       [taxonomy_term: 31]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  66                                 1       [taxonomy_term: 66]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  67                                 1       [taxonomy_term: 67]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  69                                 1       [taxonomy_term: 69]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  74                                 1       [taxonomy_term: 74]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  75                                 1       [taxonomy_term: 75]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  77                                 1       [taxonomy_term: 77]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  78                                 1       [taxonomy_term: 78]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             
  82                                 1       [taxonomy_term: 82]:               
                                             langcode.0=The value you selected  
                                             is not a valid choice.             

Seems like it’s language-related…
In my farmos_v1 installation I have installed 2 additional modules (locale and l10_update) for language settings as I mentioned in this post farmOS translation (i18n) - #4 by PDorfFarm

Now I have installed the module farm_l10n in my farmos_v2 installation (it seemed like the most similar module compared to the 2 in farmos_v1). However migration still fails with the same error message.

Update:
After adding German as additional language, I was no able to overcome this error. However now there error:

48/60 [======================>-----]  80% [error]  Migration failed with source plugin exception: Log 187 has both area references and movement area references. See https://github.com/farmOS/farmOS/blob/2.x/docs/hosting/migration.md#movement-logs in /opt/drupal/web/profiles/farm/modules/core/migrate/src/Plugin/migrate/source/d7/FarmLog.php line 138 

investigating further… :-/