Someone who walks in a laborious heavy-footed manner.

synonyms: slogger, trudger.

Someone who works slowly and monotonously for long hours.

synonym: slogger.

Dutch: ploeteraar, sappelaar, sjouwer, werkezel, werkpaard, zwoeger

Someone who moves slowly.

synonyms: slowcoach, slowpoke, stick-in-the-mud.

Dutch: treuzel
Polish: mucha w smole