It appears that the Pokemon website is hiring localisation editors to translate what is to be believed a Pokemon game for the Nintendo Switch.
The contracts are a minimum 6 months, which could suggest that a Pokemon game for the Nintendo Switch would be looking at a release time of either late this year or early 2019.
It is believed that the localisation to specific regions is only done later in development, this is not confirmed but if it is true that would give us a better idea for when the game is planned for release. If that is true, that could mean that we might see a new Pokemon game for the Switch this year at E3.