Sorry @hdegenaro, I saw this and forgot to respond.
You can say Alexa, ask TRIGGERcmd to open X if you use the TRIGGERcmd, TRIGGER command, or TC skills. This page shows the sentence format for those skills.
You can say, Alexa turn on X if you use the newer TRIGGERcmd Smart Home skill. This page shows the "Smart Home" skill sentence format.
Also, if you use an Alexa routine, you can use any word or phrase you want. For example I say, Alexa, open sesame to open my garage using a routine that translates "open sesame" to "ask TRIGGERcmd to run russ on garage" so it runs the command on my Raspberry Pi that opens my garage via the TRIGGERcmd skill.