1. Morphology:
* Verb conjugation: Unlike most languages, Interlingua aims for a consistent and regular verb conjugation system. Irregular verbs, like "to be" or "to have," which have unique forms in many languages, are minimized.
* Noun pluralization: Irregular noun plurals are avoided. For example, instead of "child - children," Interlingua uses "infante - infantes."
* Adjective and adverb formation: Interlingua generally prefers regular suffixes for forming adjectives and adverbs, avoiding irregular forms.
2. Syntax:
* Word order: Interlingua aims for a more consistent word order, which generally follows Subject-Verb-Object (SVO) pattern. While there are exceptions for emphasis or clarity, the basic structure is fairly straightforward.
* Prepositions: Prepositions are used consistently and predictably, minimizing the need to learn numerous prepositions with different meanings.
* Pronoun agreement: Pronoun agreement is simplified and follows clear rules.
3. Vocabulary:
* Cognates: Interlingua utilizes cognate words that are similar in meaning and form to words in many Romance languages. While some words might have multiple forms, the core vocabulary is designed to be predictable.
* Technical terms: While Interlingua aims for clarity and simplicity, it can sometimes use technical terms that may be less common in everyday language.
Examples of Irregularities:
* "To be" verb conjugation: While Interlingua aims for regular conjugations, the verb "to be" (esser) retains some irregular forms like "es" (he/she/it is) and "esse" (to be, infinitive).
* Latin-based roots: Although Interlingua seeks to be accessible, some words retain their Latin roots which may not be immediately familiar to learners.
* Idioms and colloquialisms: Although Interlingua is a constructed language, it may still incorporate some idioms and colloquialisms from its source languages.
Overall, Interlingua strives to minimize irregularities to facilitate language learning and communication. While some deviations may occur, the language's core structure is designed to be as regular and predictable as possible.