Why is this an issue?

The following pragmas should not be used:

-- pragma translate_off
-- pragma translate_on
-- synopsys translate_off
-- synopsys translate_on
-- synthesis translate_off
-- synthesis translate_on
-- exemplar translate_off
-- exemplar translate_on
-- altera translate_off
-- altera translate_on
-- xilinx translate_off
-- xilinx translate_on

-- pragma synthesis_off
-- pragma synthesis_on
-- synopsys synthesis_off
-- synopsys synthesis_on

-- RTL_SYNTHESIS OFF
-- RTL_SYNTHESIS ON

-- vhdl_comp_on
-- vhdl_comp_off

This list can be updated through the pragmas parameter.