roman/bugfix fix default language ingest option (#1729)
### Description
Set language to None by default. Update ingest test to use local file
used in language unit tests to validate.
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Co-authored-by: ryannikolaidis <1208590+ryannikolaidis@users.noreply.github.com>
Co-authored-by: rbiseck3 <rbiseck3@users.noreply.github.com>
