Steps to reproduce

This can be reproduced on our demo page:

1. Add en_GB locale to Site Definition
   https://demoauthor.magnolia-cms.com/.magnolia/admincentral#app:site:browser;/travel/i18n/locales/en_GB:null:
2. Add third Tab with jcrMutliField to the Component (in this case: textImage.yaml)
   https://demoauthor.magnolia-cms.com/.magnolia/admincentral#app:resources:browser;/mtk2/dialogs/components/textImage.yaml::
   Attached definition of the component.
3. Edit "Travel Home"-Template 
   1. change language to English (United Kingdom).  
   2. add "Text and Image"-Component. 
   3. got to the third Tab and add one Image
4. see the result in JCR App{}

Expected results

Data is stored on properly named nodes without issue

Actual results

Nodes name concatenates the locale + country consecutively and returns error when trying to save more times.

Workaround

Development notes