Language politics in B2B: when to use Spanish, Portuguese, Catalan, or English

The sales deck was excellent. The product was competitive. The follow-up email, drafted in clean, professional English, arrived within twenty-four hours. The Barcelona distributor read it, forwarded nothing, and never replied.

It was not the product that failed. It was the assumption behind the language that carried it.

For most Northern European executives entering Iberia, English functions as a neutral professional register. It is the language of business travel, of LinkedIn, of the conference circuit. It signals competence and international orientation. In the Nordic markets, in the Netherlands, in Germany's export corridors, this assumption holds reasonably well. The Iberian peninsula looks similar on paper. Both Spain and Portugal are EU members, both have significant English-language exposure in their educated professional classes, both host international tech ecosystems in their capital cities. The executive sends the English pitch and waits.

What they do not see is that the language choice is itself a communication, and it is communicating something they did not intend.

Spotahome is worth understanding here, not as a cautionary tale but as a map of exactly how this plays out in practice. The Madrid-founded rental platform launched in 2014 with English as its official corporate language. This was a deliberate and defensible decision. Its initial market was international students and expatriates moving between European cities, buyers who were already displaced from their home language and who expected English-language processes. The strategy worked. But as the company grew, something shifted. Roughly half of the users became local Spanish and Portuguese residents looking for accommodation in their own cities. The relational dynamic of the product had changed entirely. These were not displaced internationals comfortable with English-language rental contracts and deposits. They were locals whose trust had to be earned on their own terms, in their own register. Spotahome invested in professional localisation across six languages. After three months of properly localised content targeted at local landlords, traffic to those sections rose by 30%. The product had not changed. The price had not changed. Only the language of the relationship had changed, and that turned out to be the thing that mattered.

The lesson from Spotahome is not that English never works in Iberia. In the Portuguese tech sector it works better than almost anywhere else in Southern Europe. Portugal ranked sixth globally in the EF English Proficiency Index 2024, placing it alongside the Nordic countries and the Netherlands as a market where English-language B2B selling is genuinely viable, at least at the senior level of international-facing organisations. Lisbon's startup scene, its fund managers, its senior consultants: many of them code-switch into English without effort and without resentment. Entering Portugal in English is a different proposition from entering Catalonia or rural Castile in English, and conflating them is where the outsider typically goes wrong.

Spain is a different architecture. The EF Index placed Spain 36th globally in the same survey, in the moderate proficiency band, a gap of thirty places. But the more important point is not the aggregate score. It is what language means in Spain beyond its informational function.

In Castilian-speaking Spain, defaulting to English in a first B2B meeting reads, at best, as a signal that you are visiting rather than investing. At worst it reads as a subtle assertion of status, the assumption that the Spanish counterpart should carry the linguistic burden of the relationship. Neither reading helps close a deal. The relational culture of Spanish B2B is built on confianza, a word that translates loosely as trust but which carries a weight that the English word does not quite hold. Confianza is not established through a well-structured proposal. It is established through sustained, repeated personal contact, through demonstrating that you know enough about the person in front of you to address them in their own terms. Language is one of the primary instruments for that demonstration. Showing up in English is not illegal, it is just costly in the currency that matters most here.

Confianza is the operating architecture of Spanish commercial relationships. It is not a soft courtesy, it is the mechanism through which decisions are actually made, introductions are brokered, and commitments are honoured. The outsider who treats it as a formality to be acknowledged and then bypassed will find deals that seemed agreed upon quietly dissolving. No explanation is given. The relationship simply cools.

Catalonia adds a further dimension that catches even experienced Spain-market operators off guard. The linguistic politics of Catalonia are not separable from its commercial culture. Catalan is not merely a regional language kept alive by sentiment. It is the carrier of an identity that is experienced, in many quarters, as actively contested. The Idescat survey published in early 2025 showed that habitual daily use of Catalan had fallen to 32.6% of the population, down from 46% two decades earlier. This decline is not felt neutrally. For many Catalan business people of a certain generation and political orientation, the language question is the first test of whether an outside partner has done the work of understanding the territory they are entering.

This does not mean that every B2B meeting in Barcelona requires Catalan. It does not. Spanish functions as a working language in most commercial settings, and English is widely understood in the city's international-facing business community. But the outsider who arrives having researched nothing about the linguistic texture of the market, who assumes that Catalan is merely a dialect of Spanish, who makes an offhand remark that conflates the two cultures, will trigger a response that is not anger but distance. The relationship quietly recalibrates. The Catalan counterpart remains professionally courteous and becomes personally unavailable.

F. Xavier Dengra i Grau, who coordinates business and consumer affairs at Plataforma per la Llengua, a civil society organisation that advocates for Catalan linguistic rights, has spent years mapping the friction points between businesses and Catalan-speaking consumers and employees. His work illuminates something that purely commercial analysis tends to miss. The question of which language to use is not, for many Catalan professionals, a question of convenience or proficiency. It is a question of recognition. When a company communicates in Spanish only to a Catalan-speaking client or partner, the signal received is not always one of mere practicality. It is sometimes received as an implicit statement about the relative value of that person's language and, by extension, of their identity. Whether or not that was the intention, the received meaning is what the relationship runs on.

Portugal and Spain are often treated as a single Iberian commercial bloc by outsiders, particularly by investors who have covered the region from a London or Amsterdam base. This conflation produces its own category of misreading. The two markets share a peninsula and a history of imperial competition, but their commercial cultures are meaningfully distinct, and their relationship with language reflects that distinctness sharply.

Portuguese business culture is, in some respects, more inward-facing than Spain's. The language itself operates as a kind of protective moat. Portuguese is not mutually intelligible with Spanish, despite the geographical proximity. A senior Portuguese executive who is also fluent in English may still experience a Spanish-first approach from an Iberian regional sales team as a form of carelessness, a sign that the seller has not quite grasped that Portugal is not the southwest corner of Spain. Entering Portugal in Spanish, even with good intentions, sends a message. The correct default, in the absence of an established relationship and clear signals from the counterpart, is either English or Portuguese. In formal written communication, Portuguese is almost always the right choice for any company serious about building a lasting commercial presence in the market.

The deeper structural point is about what language signals in markets where trust is the precondition of commerce rather than its product. Northern European business culture tends to treat trust as something that accumulates after the transaction, built through performance, reliability, and repeated delivery. In Iberia, trust is expected to precede the transaction. It is the environment in which a deal becomes possible, not the reward for completing one. Language choice is one of the earliest and most visible indicators of whether the incoming party understands this sequencing.

Language choice is read not as a logistical decision but as an early signal of relational intention. The outsider who sends a first pitch in English to a Castilian-speaking mid-market company in Valencia has already communicated something before a single claim in the deck has been evaluated. What they have communicated is that they have not thought carefully about who they are addressing. In a relationship culture, that is a significant early deficit. It does not make the sale impossible. It does make the first meeting harder, the second meeting necessary, and the third meeting something you have to earn rather than expect.

There is also the matter of what happens when the outsider gets this partially right and then stops. Learning a few words of Catalan before a Barcelona meeting, or opening a Portuguese email with a line acknowledging the distinction between European and Brazilian Portuguese, or using a Castilian salutation rather than a pan-Latin American formula: each of these is legible and appreciated. But the gesture that is not followed through, the phrase deployed as an opener and then abandoned, can read as performative rather than sincere. The Iberian commercial partner who has been the object of many such gestures from visiting executives has developed a calibrated sensitivity to which of them is backed by genuine orientation to the market.

The cost of getting this wrong is not always visible in the moment it is incurred. The email goes unanswered. The meeting takes place but produces no next step. The deal that seemed to be progressing pauses and then quietly does not resume. The outsider rebooks a flight to Zurich and files the Iberian initiative under difficult market. What they rarely file it under is wrong language at the wrong moment to the wrong person.

What the outsider keeps underestimating is how much of their authority in any given Iberian market depends on being legible as someone who has genuinely arrived rather than someone who is passing through. Language is the primary instrument of that legibility. The Northern European executive who operates across four markets from a common English-language platform is not perceived as efficient. They are perceived, with great politeness, as someone whose offer can wait until someone more attentive comes along.