For nearly fifteen years I have attended Mass in French on Sundays. Starting in 2012 and up until five months ago I attended French-language Mass daily (with the occasional EF Mass, but I assume that’s not what we’re talking about here). My French comprehension is erratic, so I review the readings in my native English the day before. I might understand the gist of one out of six homilies on average, record what I can of the others for later review in an attempt to eventually understand them, and accept my incomprehension of the rest.
As for the order of the Mass, well, if you know it in one language you know it in all of them, right? I mean, even if I don’t understand the words being said, I do know the flow of the liturgy. As a result I’m comfortable attending Mass in any language, even those I have zero working knowledge of. It’s not something I have to “cope” with. At the start of my residence in France, I didn’t speak one word of French so the entire text of the Mass eluded me. Still, I recognized the gestures so I understood what was happening and never felt lost. To participate more actively in a vernacular unfamiliar to me, I mouth the words to the responses in a language I do know. I did this on vacation several months ago when I went to Mass with a reasonable expectation of having it celebrated in French or English and ultimately being surprised that it would be in Portuguese (I was not in a Portuguese-speaking area and there is no significant Portuguese community there). No matter. It was still the Mass.
I’m strongly reminded of the Rosary recited during the nightly Marian procession in Lourdes: each prayer is started in one of a number of languages, and the crowd finishes in whatever language each person knows. It’s a mess to listen to, but what a joyful and beautiful mess!

It works because the majority of those participating know how to pray the Rosary.
This year, I attended the Easter Vigil in the EF for the first time. The (non-practicing Protestant) Husband came with. Despite having a missal in hand, he was lost from the get-go. Twenty minutes later he was kicking up a fuss and threatening to walk out, so I suggested he set the missal aside and just let the liturgy soak in, let it penetrate his heart and soul. He did so, calmed down, relaxed, and remained—happily!—until the Mass ended three hours later. So that is my advice to those who would be perturbed by the prospect of attending Mass in a language unknown to them: don’t try too hard. Release your apprehensions and welcome the presence of the Lord, who knows your heart and understands all languages.
As for regretting the “loss” of Latin, I’m not sure what that means. Most people I know in OF parishes don’t give the scarcity of Latin a second thought, and those I know who regularly attend the EF have nothing to regret.
God bless!