i18n: timesince function needs review

[achumakov]

timesince() needs internationalization, as it currenly produces English-only output (M jS template; 'ago', etc.)

This is not really easy task as both PHP and Wordpress lack proper i18n mechanics for this task.

Maybe, just fallback to datetime without any 'ago' attempts when current locale is not English.

[raduconst]

I think that there's a function called human_time_diff that can be used in this case. By changing the post_modified case from the term_column_default function and replacing everything with:
return sprintf( esc_html__( '%s ago', 'edit-flow' ), human_time_diff( get_the_time( 'U', $post->ID ), current_time( 'timestamp' ) ) );
the last column of the table will display automatically the right time difference without using the timesince function. I gave this a try on my side and everything works pretty well.

[rinatkhaziev]

This has been fixed in #410 and merged.