Update README.md

README.md

@@ -7929,11 +7929,12 @@ For each language, either the [ISO 639 code](https://www.iso.org/iso-639-languag
 # Columns
 - `English_Name`: Language name in English (e.g. `"French"`).
 - `Native_Name`: If value is not `0`, corresponds to the name of the language by native speakers (e.g. `"Français"`) which may have been found in Wikipedia's `nativename` field.
-- `Glottocode`: the language tag in the Glottolog convention (e.g. `stan1290`).
+- `Glottocode`: The language tag in the Glottolog convention (e.g. `stan1290`).
 - `near_ISO6393`: the ISO 639-3 code closest to the Glottolog convention (e.g. `fra`) This information comes from [Glottolog](https://glottolog.org/meta/downloads) and may therefore be incomplete compared with column `639-3` from [ISO](https://www.iso.org/iso-639-language-code).
-- `639-3`: the language tag in the ISO 639-3 convention (e.g. `fra`).
-- `639-2_B`: the language tag in the ISO 639-2_B (B for bibliographic) convention (e.g. `fre`).
-- `639-2_T`: the language tag in the ISO 639-2_T (T for terminological) convention (e.g. `fra`).
-- `639-1`: the language tag in the ISO 639-1 convention (e.g. `fr`).
+- `639-3`: The language tag in the ISO 639-3 convention (e.g. `fra`).
+- `639-2_B`: The language tag in the ISO 639-2_B (B for bibliographic) convention (e.g. `fre`).
+- `639-2_T`: The language tag in the ISO 639-2_T (T for terminological) convention (e.g. `fra`).
+- `639-1`: The language tag in the ISO 639-1 convention (e.g. `fr`).
 - `Scope`: If value is not `0`, `I` for an individual language (e.g. "French"), 'M' for a macrolanguage, 'S' for special i.e non-language codes (e.g. "und" for Undetermined)).
-- `Language_Type`: If value is not `0`, `A` for ancient language that went extinct long ago (e.g. `got` for Gothic), `C` for constructed i.e artificial languages, excluding programming languages (e.g. `epo` for Esperanto), `E` for extinct i.e. language that went extinct recently (e.g. `rbp` for Barababaraba), `H` for historical i.e. extinct language distinct from modern languages that descended from it (e.g. `ofs` for Old Frisian), `L` for living i.e. currently spoken language (e.g. `fra` for French), `S` for special i.e. non-language codes (e.g. `und` for Undetermined).
+- `Language_Type`: If value is not `0`, `A` for ancient language that went extinct long ago (e.g. `got` for Gothic), `C` for constructed i.e artificial languages, excluding programming languages (e.g. `epo` for Esperanto), `E` for extinct i.e. language that went extinct recently (e.g. `rbp` for Barababaraba), `H` for historical i.e. extinct language distinct from modern languages that descended from it (e.g. `ofs` for Old Frisian), `L` for living i.e. currently spoken language (e.g. `fra` for French), `S` for special i.e. non-language codes (e.g. `und` for Undetermined).
+- `#L1_Speakers`: Indicates a (rounded) estimate of the number of speakers (L1) per language; the estimate comes from [Writing System and Speaker Metadata for 2,800+ Language Varieties](https://aclanthology.org/2022.lrec-1.538/).