❓ Featured images for different languages or in frontmatter

[etoosamoe]

Is your feature request related to a problem? Please describe.
Hi! It works great when you create file index.en.md with post's text - it shows for specified language. But I haven't found any way to use different featured image for different languages.

Describe the solution you'd like
By default use *feature* image name mask, as usual. If there is .en. or .<langcode>. in the file name - use it only for specified language.

Describe alternatives you've considered
As alternative you should be able to set featured image path in a frontmatter, e.g. featured_image: different_image.jpg

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