"I already have plans."
Translation:У меня уже есть планы.
Yes, it is. Here, "есть" is quite important, because it proudly proclaims the existence of plans and lands "уже".
Though, in colloquial speech this could be saved by adding an object or day which you have plans for ("У меня планы на завтра" / "У меня на тебя большие планы"). Otherwise these "already plans" do not work together—and kind of suggest that what you say is not finished.
We accept it anyway; it is just not something you would normally say about your everyday "plans"—BUT you could say it about some official plans.
This structure just sounds as if you were being suggested "plans", and you said you already had them. It is OK for floor plans or work plans but fairly odd for your plans for the evening (people do not make your plans for you). Context matters.
One of the most typical ways of expressing possession in Russian is using У + Genitive + есть. У "converts" a person into a virtual "place", where certain objects can be found. Expressing possession through existence is, actually, rather common across the globe.
For real buildings and rooms we use в (e.g. "В комнате (есть) большой ковёр"~"There is a big rug in the room" / "The room has a big rug").
Я уже есть планы is nonsensical. It could be translated as "I already there are plans." (Ignore Google Translate, if you have been using it.) To indicate possession, Russians use the expression У меня есть. У cannot be directly translated, but у меня уже есть планы means something like "there are already plans with me." The preposition у requires the genitive case for its object (меня). In a literal translation, "me" would be мне and меня would be "mine", but Russian grammar is not altogether logical (for English speakers).
"У" means something like "at." The words "у меня" together mean "I have" in the sense of possession (literally "at me"). This "у" is put in front of many words in the genitive to indicate possession like "у мальчика яблоко" ("the boy has an apple"), or "у меня немного денег" ("I have a little money.")
Hi Krlis--many thanks for the reply. when i first asked about how to answer questions in russian, i was sent a page and referenced a site that gave what you should use if you don't have a Cyrillic keyboard, (i'm on windows 10) most work (which helps when i'm traveling and using my phone) but the soft sign doesn't, which means it is impossible to get words like "est" correct. also, can't cut and paste on the phone--v/r--dr b
You're better off using a native keyboard; all modern computers and smartphones have them. There are many posts on the subject. There is a "sticky" in the Russian forum and there are many posts in the Дима - это дом conversation. I use Windows 10 too. If you have a touch screen computer, you can use the on screen keyboard - very convenient.
I'm still not sure I agree with you. From everything I've seen, foreign words decline unless the word ending contradicts its Russian gender. E.g. Вашингтон declines and has plural forms:
And Париж also declines. There are no plural forms listed on Wiktionary but we would have to assume that's because a plural of a city is fairly meaningless. If there were a plural it would be straightforward to extrapolate the declension.
I guess it's not as simple as I thought. Still такси and метро do not decline and have no plural. Also many proper nouns (see http://russianlearn.com/grammar/category/declension_of_proper_names). I'm just going to forget about it for the time being. It's much more complicated than anything I wanted to get into.