The Daily Mail reported an internal mail called on 450 Scottish staff members to take Polish lessons since many of the workers could not understand English.
Some ill-will has developed between foreign and local staff, the paper reported, with some local staffers fearing Polish workers are edging them out.
The Daily Mail did not reach Uniq-owned Pinney's for comment on the story.
Western European countries have seen a surge of workers arrive from new Eastern EU members seeking employment.
Many of the jobs filled by these workers go unfilled by locals.