The Plena Manlibro de Esperanta Gramatiko (PMEG), written by Bertilo Wennergren, is the most detailed practical account of Esperanto grammar available to many speakers. It explains patterns through extensive examples from the Fundamento, Zamenhof, later literature, and current usage. PMEG is not itself the Fundamento or an official Akademio decision; its strength lies in transparent analysis, broad evidence, and explicit practical recommendations.
Its role is therefore different from the formal and advisory layers described under Akademio recommendations, even where the two arrive at the same practical advice.
What “descriptive” means here
A descriptive grammar asks how competent users actually form and interpret expressions. It identifies recurring contrasts, variation, change, and register rather than deriving every answer from abstract logic. Description does not mean recording every attested error as equally normal.
En la tekstoj aperas ambaŭ formoj, sed unu estas multe pli ofta en moderna prozo.
Both forms appear in the texts, but one is much more frequent in modern prose.
That is a descriptive claim about distribution. PMEG also evaluates usage, calling some forms clear, rare, avoidable, traditional, or contrary to a basic pattern. It therefore combines description with norm-aware advice.
La formo estas komprenebla, tamen PMEG rekomendas la alian pro pli klara strukturo.
The form is understandable; nevertheless, PMEG recommends the other one because of its clearer structure.
This does not make the first form imaginary. A complete note should preserve both attestation and recommendation.
PMEG's terminology
PMEG deliberately uses accessible terms centered on Esperanto form. It speaks of O-vortoj, A-vortoj, E-vortoj, I-verboj, U-verboj, vortetoj, rolvortetoj, and N-finaĵo where traditional grammars may say nouns, adjectives, adverbs, infinitives, volitives, particles, prepositions, and accusative.
La vorto «rapide» estas E-vorto, ĉar ĝi finiĝas per -e kaj ĉi tie priskribas la agon.
The word ‘rapide’ is an E-word because it ends in -e and here describes the action.
En «Mi legis la libron», la N-finaĵo montras la rektan objekton.
In ‘Mi legis la libron,’ the N-ending marks the direct object.
These terms are analytical tools, not new grammar. They often prevent false assumptions imported from Latin or English categories. Yet readers of linguistics still need to map them to conventional terminology.
| PMEG term | Common traditional term | Important caution |
|---|---|---|
| O-vorto | noun | defined visibly by Esperanto form |
| rolvorteto | preposition | PMEG's category emphasizes role marking |
| N-finaĵo | accusative ending | also has non-object uses such as direction and measure |
| U-verbo | volitive/imperative form | can have first- or third-person subjects, not only “you” |
La instruisto diris «akuzativo», dum PMEG diras «N-finaĵo»; ili priskribis la saman finaĵon el malsamaj vidpunktoj.
The teacher said ‘accusative,’ while PMEG says ‘N-ending’; they described the same ending from different perspectives.
Do not turn a terminological difference into a dispute about what Esperanto speakers actually say.
Reading the example codes
PMEG marks many cited examples with compact source codes. FE points to the Fundamenta Ekzercaro; other codes identify Zamenhofian or later works. These labels let readers distinguish an invented teaching example from historical evidence and inspect its context.
La ekzemplo havas la markon FE, do mi serĉos ĝin en la Ekzercaro, ne en moderna gazeto.
The example has the label FE, so I will look for it in the Ekzercaro, not in a modern newspaper.
A citation establishes that the form occurred in that source. It does not alone establish present-day frequency, neutral register, or the author's full system. PMEG's surrounding discussion often supplies exactly those qualifications.
Unu citaĵo pruvas, ke la formo ekzistis; ĝi ne pruvas, ke ĉiuj aŭtoroj ĉiam uzis ĝin.
One citation proves that the form existed; it does not prove that all authors always used it.
The linked Tekstaro context is particularly useful: a line from a nineteenth-century translation, a speech, and a contemporary magazine carry different evidential weight for modern conversation.
PMEG, Fundamento, and Akademio
Use each source for its proper question:
- the Fundamento establishes the immutable baseline;
- formal Akademio decisions and Official Additions establish institutional positions and official lexical status;
- PMEG synthesizes structure, evidence, interpretive alternatives, and practical advice;
- corpora show attestation and distribution within their holdings.
PMEG klarigas la diferencon per dudek ekzemploj, dum la Fundamento donas la bazan modelon en nur kelkaj frazoj.
PMEG explains the difference with twenty examples, while the Fundamento gives the basic model in only a few sentences.
Detail does not outrank foundational status. Conversely, the Fundamento's brevity does not make every later detailed question unanswerable.
La Akademio formale decidis pri la demando, kaj PMEG montras, kiel la decido rilatas al realaj frazoj.
The Akademio formally decided the question, and PMEG shows how the decision relates to real sentences.
PMEG may agree with an Akademio recommendation and explain why; cite the underlying Akademio document if formal status is the point.
Variation and recommendation
PMEG is especially valuable where simplistic rules fail. It may distinguish:
- a foundationally secure core;
- a widespread modern alternative;
- a rare but intelligible form;
- a historical construction;
- an innovation that remains disputed;
- a form best avoided because it creates ambiguity.
Ambaŭ frazoj estas gramatike eblaj, sed la unua estas la pli sekura elekto por internacia publiko.
Both sentences are grammatically possible, but the first is the safer choice for an international audience.
That recommendation is compatible with description. A teaching grammar must help learners choose, not merely list every attested form. The key is to label the reason: clarity, frequency, neutrality, or conformity with a productive pattern.
PMEG ne nomas la duan formon erara; ĝi avertas, ke legantoj povas miskompreni ĝin.
PMEG does not call the second form wrong; it warns that readers may misunderstand it.
Versions and revision
PMEG has been revised repeatedly. A page may change after new corpus evidence, Akademio guidance, or improved analysis. When a disputed detail matters, note the version or consultation date rather than citing “PMEG” as timeless.
La reta versio estis ĝisdatigita, do mi kontrolis, ĉu la malnova klarigo ankoraŭ validas.
The online version was updated, so I checked whether the old explanation still applies.
Revision is a strength of descriptive scholarship: claims can become more precise without changing the Fundamento. It also means quotations need a stable date or edition in academic work (academic).
Logic is evidence, not a substitute for usage
Esperanto's morphology is systematic, but speakers conventionalize particular meanings. A logically possible derivation may be rare or understood differently. PMEG commonly compares compositional reasoning with documented practice.
La vorto estas regule konstruita, tamen ĝia kutima signifo ne estas tiu, kiun mi unue divenis.
The word is regularly constructed, but its usual meaning is not the one I first guessed.
This is why learners should not reject an established form merely because another analysis feels more elegant. Nor should they defend an opaque invention solely because its pieces can be parsed.
Ni kontrolu ekzemplojn antaŭ ol konkludi, ke la plej logika analizo estas la sola uzata.
Let us check examples before concluding that the most logical analysis is the only one used.
Turn analysis into a speaking decision
PMEG is most useful when its distinctions lead to a concrete choice. First identify the structural contrast: which word governs which element, what meaning each ending contributes, and where ambiguity arises. Then identify the usage assessment: frequent, rare, historical, disputed, or merely possible. Finally apply the communicative setting. A transparent form suitable for an explanatory essay may feel heavy in conversation; a compact familiar expression may need explanation in an international technical document.
Do not copy a warning label without its reason. “Avoid” may mean that a form conflicts with a productive rule, but it may instead mean that readers could momentarily attach a phrase to the wrong word. The remedy differs: the first case calls for another construction, whereas the second might be repaired by word order or fuller context. PMEG's long discussions are valuable precisely because they expose that reasoning.
For an English-speaking learner, this prevents a familiar trap. English often hides relations through fixed order and unmarked word classes; Esperanto makes many relations overt through endings and the accusative. An English paraphrase can therefore confirm the intended message without confirming the Esperanto structure. Analyze the Esperanto sentence on its own terms before using translation as evidence.
Common Mistakes
Calling PMEG an official Akademio grammar
❌ PMEG estas oficiala decido de la Akademio pri ĉiu gramatika demando.
Incorrect — PMEG is an independently authored grammar, not a collection of formal Akademio decisions.
✅ PMEG estas detala gramatiko, kiu ofte citas la Fundamenton kaj Akademiajn decidojn.
PMEG is a detailed grammar that often cites the Fundamento and Akademio decisions.
Treating description as approval of every hit
❌ Se PMEG mencias formon, ĝi rekomendas al lernantoj uzi ĝin.
Incorrect — PMEG may mention a form to label it rare, disputed, or avoidable.
✅ Mi legos la tutan klarigon por vidi la distribuon kaj rekomendon.
I will read the whole explanation to see the distribution and recommendation.
Turning PMEG terminology into new grammar
❌ O-vorto estas alia gramatikaĵo ol substantivo nur pro la malsama nomo.
Incorrect — the terms frame the category differently; they do not create a second language system.
✅ La termino O-vorto emfazas la videblan finaĵon -o.
The term O-word emphasizes the visible ending -o.
Quoting an example without its period or register
❌ La formo aperas en unu malnova romano, do ĝi estas neŭtrala en hodiaŭa konversacio.
Incorrect — a historical citation establishes attestation, not current conversational neutrality.
✅ La historia ekzemplo montras pli fruan uzon; por nuna registro mi serĉos modernajn fontojn.
The historical example shows earlier usage; for present-day register I will look for modern sources.
Key Takeaways
PMEG is a deeply evidenced, practical, revisable grammar—not the Fundamento and not an official Akademio code. Its special terminology makes Esperanto structure visible, its source labels make arguments inspectable, and its recommendations help learners choose among attested possibilities. Read examples, qualifications, and advice together, then cite the primary authority when formal status is the question.
Related Topics
- The Fundamento and the Living LanguageC1 — Understand how Esperanto combines an immutable foundational standard with productive vocabulary growth, changing usage, and accepted modern variation.
- Akademio RecommendationsC1 — Interpret Akademio decisions, Official Additions, recommendations, dictionary status labels, and consultation answers without overstating their force.
- Corpus Evidence from TekstaroC1 — Use Tekstaro searches to evaluate Esperanto attestation, frequency, period, genre, collocation, and variation without mistaking corpus hits for rules.
- Age, Medium, and Community VariationC2 — Analyze how generation, communication medium, and social networks shape Esperanto without turning tendencies into rules.
- Accepted Variation and Personal StyleC2 — Distinguish stable grammar, accepted alternatives, register choices, individual style, and genuinely nonstandard forms in Esperanto.
- Zamenhofian Style without ImitationC1 — Learn from Zamenhof's clarity, derivational economy, and sentence movement without copying historical surface features as modern rules.