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World map of linguistic diversity index (linearly proportional to the shading intensity). Data is from the 18th edition of Ethnologue: Languages of the World.. Linguistic diversity index (LDI) may refer to either Greenberg's (language) Diversity Index [1] or the related Index of Linguistic Diversity (ILD) from Terralingua, which measures changes in the underlying LDI over time.
Below are the top foreign languages studied in American institutions of higher education (i.e., colleges and universities), based on the Modern Language Association's census of fall 2021 enrollments. "Percentage" refers to each language as a percentage of total U.S. foreign language enrollments. [3]: 49
The EF English Proficiency Index (EF EPI) attempts to rank countries by the equity of English language skills amongst those adults who took the EF test. [2] It is the product of EF Education First, an international education company, and draws its conclusions from data collected via English tests available for free over the internet.
The simplest definition of literacy in a nation is the percent of people age 15 or older who can read and write, which is used to rank nations. More complex definitions, involving the kind of reading needed for occupations or tasks in daily life, are termed functional literacy, prose literacy, document literacy and quantitative literacy.
The exception is the DLIELC (Defense Language Institute English Language Center), which assigns a + designation for failure/inconsistency at the next higher level. Grades may be assigned separately for different skills such as reading, speaking, listening, writing, translation, audio translation, interpretation, and intercultural communication.
The languages are broken into tiers based on their difficulty level for a native English speaker as determined by the Defense Language Institute. The category into which a language is placed also determines the length of its basic course as taught at DLI. To qualify to pursue training in a language, one needs a minimum score of 95.
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It can be used to select students who have the capability to excel in foreign language learning (and may be ready to start instruction earlier), provide a profile of strengths and weaknesses, place students with similar learning rates in the appropriate class, and start to build a history of language learning difficulty, which could be used in ...