Very good. Got it working correctly. I created a node under /apps/dam/options/predicates/language that matched exactly the metadata "value" in the language drop-down contained in the schema. Using the "Options Predicate" in the search rail and set as below, all works well. In our case, the language drop-down in the schema had been created with the language name as the title, but the "value" contained the 2 or 4 letter language abbreviation. We needed to make sure the "value" in the search predicate matched exactly what was in the drop-down. Seems obvious now but at the time just missed the connection. Thanks Scott, appreciate your help!
Jim P

