R.J.
In my heart/mind.
(Prologue: I'm using the word God, below for simplicity. As you'll see why.)
I don't pray out loud. I LOVE listening to others pray, but I don't use words, myself. I just think at or feel at.
HOWEVER... If its not in English... I'm golden. I can sing to god with my Jewish friends in Hebrew (Sh'ma Yisrael), Recite my Latin masses (in nomine Patris, et Filii, et Spiritūs Sancti), perform Salat in Arabic (Allah' Akbar), ride the wave of the bells or curl of smoke in Buddhist temples, etc... And feel God. As much as I do, in my ongoing conversations with just thoughts and feelings. If not more. The beauty of sound is that it focuses ones thoughts... Or at least mine. It's a set aside special time. But not in English.
For me, if I'm using English, I'm usually griping. 'Was that REALLY necessary?', 'A bit over the top, don't you think?' which is just wrapping paper for what I'm really feeling and can be completely ignored for the facade it is.
I find god everywhere. In beauty, in movement, in surfing, in riding, in science, in art, in that amazing moment right before all hell breaks loose, in tears, and sore muscles, in grief, in hope, in people, in an indrawn breath, in all things great and small.
I think it may stem (the no English bit) from growing up overseas, as well as in my friends' places of worship -I've never had my own-, which were rarely conducted in English. Hebrew, Latin, Arabic, Japanese, CajunFrench... Combined with being told I don't know how many times, in how many places that you can never lie to God, because what's in your heart is truth, and god can see into your heart.
Unless I'm writing, I rarely talk about god/religion. What I have makes sense to ME... But it sounds strange talking about god -in English- out loud. Incomplete.
How OFTEN do I pray? It depends. I talk to god all the time (several times a day), but I very rarely ASK God for anything. If I can do it myself, I should... And asking for help is dangerous. Be careful what you wish for... You might just get it! I've found to be VERY true in my own life. Talking to god... Asking... I find very different than Praying i see/feel as Sending thanks or hopes. Talking several times a day. Asking, rarely (foxhole style, tends to be life and death). Thanks & Hopes at least every morning and every night, and usually midday as well as any time I find something stirringly beautiful.
Most people wouldn't guess I'm deeply religious... Just because it's something I don't have the words for. But others do. So I use theirs and feel mine.