These are the packages that would be merged, in order:

Calculating dependencies ...

!!! Problem resolving dependencies for =app-dicts/myspell-large-en-20201207
 done!
Dependency resolution took 0.84 s (backtrack: 0/20).


!!! The ebuild selected to satisfy "=app-dicts/myspell-large-en-20201207" has unmet requirements.
- app-dicts/myspell-large-en-20201207::gentoo USE="" L10N="-en -en-AU -en-CA -en-GB -en-US"

  The following REQUIRED_USE flag constraints are unsatisfied:
    any-of ( l10n_en l10n_en-AU l10n_en-CA l10n_en-GB l10n_en-US )