private int getRow(Language lang) {
			if (lang == null) {
				return -1;
			}
			int index = 0;
			for (LanguageDescription ld : displayList) {
				if (ld.getLanguageID().equals(lang.getLanguageID())) {
					return index;
				}
				++index;
			}
			return -1;
		}
Select the highest priority language being displayed.
If more than one language has the highest priority, then the first
one will be used.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bean/SelectLanguagePanel.java