Changing from Hungarian to English and vica cersa

Just a short post about how to sign that we are using one or the other language. At present I'm trying to use every time to talk in English to E. So for instance, when D. takes the dog out for 20-30 minutes in the morning or in the evening E. and I change into English.

Before I start speaking English I sing the 'Hello' song. It is taken from the BBC programme called Something Special. (Jump to 0:20 for the song)

Before we change into Hungarian, I sing the "Goodbye song" from the same programme. (You can find the video below - just jump to 13:20. This is where the "Goodbye song" starts. Otherwise it's a great episode on birthdays. Worth watching the whole). I also use the MAKATON signs while I sing. E. takes pleasure in it and the songs make it clear when we use one language and the other.

I'm sure there are several other ways to give a signal for changing between the languages. I look forward to your comments on how YOU do it.