@Test
	public void testGetOldContextRegister() {
		Register reg = trans12.getOldContextRegister();
		assertNotNull(reg);
		assert (reg.isProcessorContext());
		assertEquals(0x2000, reg.getAddress().getOffset());
	}
Return language which has modified context field offsets/sizes, register
offsets, and compiler-spec ID's

NOTES: 1. Translation can not be handled by DefaultLanguageTransaltor 2.
SimpleLanguageTransaltor should handle it
Ghidra/Features/Base/src/test/java/ghidra/program/util/LanguageTranslatorAdapterTest.java