'''Basic Trope''': An alien language is grammatically almost identical to the language of the target audience.
* '''Straight''': The inhabitants of Planet Troperius speak a language with grammar similar to that of European languages.
* '''Exaggerated''': The language of Planet Troperius is [[AliensSpeakingEnglish almost perfect English]].
* '''Downplayed''': The language of Planet Troperius has an unusual grammar, but enough for the universal translator to pick it up.
* '''Justified''':
** The inhabitants of Troperius are HumanAliens, descended from Proto-Indo-Europeans who discovered a wormhole, ended up there, and evolved much like the various humans of Earth did.
** In ages past, aliens enslaved an Indo-European tribe. [[HeWhoFightsMonsters He Who Fought Oppressors]] became oppressive in turn, and the resulting empire dominated the galaxy, and the majority of alien languages today are descended from the language of TheEmpire.
** The structures of the sentences (not only with Indo-European languages, but in general with those of planet Earth) are more common throughout the universe than it may seem.
* '''Inverted''':
** The inhabitants of Planet Troperius speak a totally alien language even the universal translator can't decipher.
** Humans learned Proto-Indo-European from alien precursors.
* '''Subverted''': Troperians speak a language that ''looks'' or ''sounds'' Indo-European at first, but the grammar is actually exotic bordering on StarfishLanguage.
* '''Double Subverted''': In the end it turns out that they were misunderstanding him and if they structurally resemble Indo-European languages.
* '''Parodied''': The aliens often complain about the absurd grammar of their own language, which is almost identical to [[TakeThat [=[Insert Target Indo-European Here]=]]].
* '''Zig-Zagged''':
** The structure varies according to the meaning of the sentence.
** The aliens come from a [[MulticulturalAlienPlanet multicultural planet]], and the structure of the phrases is variable according to the culture.
* '''Averted''': The structure of the sentences is totally different from those of the Indo-European languages.
* '''Enforced''': "We need an alien language whose structure is easy to remember."
* '''Lampshaded''': "The grammatical structures are very similar to those of the Indo-European languages, what were the chances of that happening?"
* '''Invoked''': The aliens had no language, then they made FirstContact with a human who natively spoke an Indo-European language, and when they return to their homeworld, they teach that language to the other inhabitants, who use it as the base for their own language.
* '''Exploited''': During the FirstContact, translators compare their phrases with those of Indo-European languages.
* '''Defied''': The aliens try to make their language less reminiscient from European languages, thinking that they will confuse humans.
* '''Discussed''': "This is my thesis, on why the dominant language of Troperius looks like a [[http://en.wikipedia.org/wiki/Centum-Satem_isogloss satem]] version of [[http://en.wikipedia.org/wiki/Proto-Celtic_language Proto-Celtic]] with [[http://en.wikipedia.org/wiki/Verner%27s_law Verner's law]]."
* '''Conversed''': "I wonder why aliens speak [[BlatantLies Indo-European]] langauges."
* '''Deconstructed''': The [[AliensAreBastards aliens came with warlike intentions]], but once somebody who speaks English figures out their language's grammatical similarity to English, it becomes only a matter of time before humans repel the attack.
* '''Reconstructed''':
** The aliens are so far ahead in their plan of conquest that humans figuring out how to decode their language wouldn't do much good now.
** The aliens began their invasion in a remote place where English isn't yet widespread.
** The aliens ''also'' have languages that are like Finnish, Mandarin, Swahili, and Cree, and [[HidingBehindTheLanguageBarrier they use those to communicate once their English is found out]].
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%%Optional items, added after Conversed, at your discretion:
%%* '''Implied''': ???
%%* '''Plotted a Good Waste''': ???
%%* '''Played for Laughs''': ???
%%* '''Played for Drama''': ???