{Xx}

{Xx}

English: letter X

Part of Speech

Grapheme

Semantic Domain

Orthography; Writing System

Definition

{Xx} is the official grapheme adopted in the Portugal–Claveria orthography to represent the Boie’nen phoneme /X/, a distinct posterior continuant typically realized phonetically as [ʁ ~ ʁ̞ ~ ɣ ~ ɣ̞], with variation among speakers and phonetic environments.

The grapheme itself is conventional; the phoneme it represents is an inherent feature of the Boie’nen sound system.

Alphabet Position

Xx follows Ww and precedes Yy in the Boie’nen alphabet.

Orthographic Value

{Xx} → /X/

Pronunciation

The Boie’nen phoneme /X/ is not equivalent to the pronunciation of the letter X in English (eks) or Spanish (equis), nor does it represent the consonant sequences /ks/, /gz/, or /s/ found in those languages.

Instead, it represents a single posterior continuant phoneme unique to Boie’nen.

Pedagogically, the letter may be described as “Ro (sans trill)” because its articulation resembles a posterior r-like sound produced without the tongue-tip trill.

Examples

xata’ — purplish pallor

saxag — bird’s nest

gatex — itch

dakexe’ — big

e’xi — sit on

Phonemic Contrast

The grapheme {Xx} represents only the phoneme /X/.

It never represents /G/.

Likewise,

{Gg} → /G/

and never /X/.

This preserves a strict one-grapheme–one-phoneme correspondence.

Examples include:

axas — snake

agas — namby-pamby; effeminate

angngex — breath odor

angngeg — forehead

Because these pairs differ in meaning, /G/ and /X/ are analyzed as separate phonemes and are assigned separate graphemes.

Historical Background

The posterior continuant was first analyzed phonemically by Yukihiro Yamada (1972), who described it as a voiced velar-uvular fricative and recognized it as a distinct phoneme of Boie’nen. 

Working independently, Dominga L. J. Portugal (2000) recognized the same distinctive sound while developing a practical orthography for Boie’nen. Rather than forcing it into an existing alphabetic convention, she consulted several phoneticians regarding its representation and adopted a dedicated symbol. Her publication contains no apparent reference to Yamada’s earlier study. 

The present orthography adopts the Roman letter {Xx} as a practical grapheme for this phoneme while preserving the one-phoneme–one-grapheme principle.

Comparison with KWF (2023)

Both the KWF orthography and the Portugal–Claveria orthography distinguish /G/ from /X/.

Their principal difference lies in grapheme selection.

The adoption of {Xx}:

• preserves one grapheme for one phoneme;
• avoids reliance on modified Unicode characters;
• improves keyboard and mobile-device compatibility;
• facilitates digital searching and machine sorting;
• provides an immediate visual distinction between /G/ and /X/.

Katon (Cartilla) Note

Traditional Boie’nen literacy emphasized a one-consonant–one-sound relationship.

Using separate graphemes maintains that educational principle:

ga ge gi go

xa xe xi xo

allowing beginning readers to distinguish immediately between /G/ and /X/.

Orthographic Principle

The choice of {Xx} is not based on the English or Spanish value of the letter X, but on its function as a dedicated grapheme representing a uniquely Boie’nen phoneme.

Orthographic symbols are conventional; phonemic distinctions are linguistic.

See Also

/G/

/X/

{Gg}

References

Yamada, Y. (1972). The Buhi Dialect (Bikol) Phonology, Morphology and Vocabulary.

Portugal, D. L. J. (2000). Buhi Dialect (Boînən).

KWF. (2023). Ortograpiyang Boinen.

Claveria, A. T. (2026). Boie’nen (Old Buhi Language) Living Dictionary.