Favour the Majority... As per usual...

[FunkyBunch]

I have never been matched with a non-English group. Maybe it's your server or DF settings.
If you put F-G-J you could potentially be matched with them.

That said, there's no reason for the group to slow down for YOU.
3/4 of the people in the dungeon are there for their roulettes. If you want to experience, do it yourself afterwards.
I've gone in unsynced with my chocobo to clear dungeons I wanted to experience more of and read the signs after I've cleared the content.
Some of the mechanics can be tricky, but it's not impossible for most up to and including some level 50 content.

[Tyrn]

If you put F-G-J you could potentially be matched with them.

You'll get matched with them regardless of what you pick because they always put E in anyway, trust me I've not had JDF selected since late 2.0/2.1 but I still run into plenty of Ds and Fs.

[Rawrz]

I've gone in unsynced with my chocobo to clear dungeons

Whaaaa... is... is this a thing now?!! * Insert Fat Cat doing push-ups*

[FunkyBunch]

Whaaaa... is... is this a thing now?!! * Insert Fat Cat doing push-ups*

I know you can summon a chocobo if you're in there by yourself. Not sure if you can have him out before you go in.

[OoglieBooglie]

I know you can summon a chocobo if you're in there by yourself. Not sure if you can have him out before you go in.

Not true. I just tested it by going into sastasha normal unsynced alone and trying to summon my chocobo.

[FunkyBunch]

Not true. I just tested it by going into sastasha normal unsynced alone and trying to summon my chocobo.

That's super weird. I beat Temple of Qarn last week with my chocobo...

[FunkyBunch]

Not true. I just tested it by going into sastasha normal unsynced alone and trying to summon my chocobo.

I also did it with my chocobo on Haukke Manor to get the mapping the realm achievement for that one room upstairs that no one ever goes into. So I'm not sure what the deal is.