Attrition
Competency/fluency/proficiency
Creole exceptionalism
Critical Period Hypothesis
Deficit Models
Heritage Speakers
Inequality regimes
Languagelessness
Language dominance
Language as a gradient
Monolingualism
Monoglot standardization
Multilingualism
Native speakerism
Potential fluent speakers?
Raciolinguistic Perspective
Semi-speakers
Translanguaging
The 'Global North'