Does Spanish use parenthetical pluralization?

Question

In English, we sometimes enclose in parentheses the plural of a word to indicate that the possibility exists that a subject could also be plural. An example is below:

The location(s) must be announced by noon tomorrow.

Use of this is not advised for academic writing, but for certain situations or professions (e.g., legal), it is necessary. Does Spanish use this same convention and, if so, how does it handle words that drop the accent when such a parentheses is added? For example:

Localización(es)

or

Localizacion(es)

Or is this simply not a practice used in Spanish? If it is, please advise me on what the standard convention is for dealing with those words that drop the accent when pluralized. Also, in English you'll find many a discussion on whether or not to have the verb correspond with the singular or plural. After doing a bit of research on that topic, it appears that both are acceptable, but some prefer one over the other. How is it handled in Spanish (if the parenthetical plural even exists)? Does the Real Academia Española have anything to say about it? For the sake of simplicity and to avoid argument/debate, I chose to avoid it altogether in the example above by using a construct that worked for both -- must be announced -- but I am curious about what authoritative sources say about the subject as well as what is commonly practiced.

Answer 1

Following the hint dropped by fedorqui, I'll translate what the paragraph 4.2.1.3.b of the Ortografía says:

[The slash] is used to express a disjunction syntactically, indicating the existence of two or more possible options from which an opposition or, more frequently, a relation of alternation or optionality is established. [...] The original word must be written with the accentuation that corresponds (with or without graphic accent), regardless of the accentuation of the option referred by the morpheme: examen/es (although it is exámenes).

So your answer is localización/es, as the original word (localización) is written with graphic accent. As for the concordance between words, the whole example should be written like this:

La/s localización/es será/n anunciada/s mañana.

the same way as we would write queridos/as niños/as to maintain the concordance even with the options. But I find that there are too many slashes there, so I would change it for:

La localización (o localizaciones) será anunciada mañana.

Answer 2

De acuerdo a la Real Academia Española, en el diccionario panhispánico de dudas, tenemos la especificación de uso de los paréntesis. En el item 2. Usos inciso c) indica que tanto el paréntesis como la barra son correctos:

Para introducir opciones en un texto. En estos casos se encierra entre paréntesis el elemento que constituye la alternativa, sea este una palabra completa, sea uno de sus segmentos: En el documento se indicará(n) el (los) día(s) en que haya tenido lugar la baja; Se necesita chico(a) para repartir pedidos. Como se ve en los ejemplos, los paréntesis que añaden segmentos van pegados a la palabra a la que se refieren. En este uso, el paréntesis puede alternar con la barra.(→ )