In the fight scene at the hospital, it very clear that it is David Janssen's stunt double fighting Claude Akins as his face is noticeably visible.
When Kimble brings Jimmie to the farm house he is unable to communicate with the old German woman due to her not speaking English. After hot wiring and steeling the woman's pickup truck she is able to explain in great detail everything that happened to the Sheriff's deputy over the phone. Thus her ability to speak and understand English is completely opposite of what it was when Kimble spoke to her.