Can I Demand That the Bid Is in Our Local Language?

Language is one of the most overlooked - but critical - details in public procurement.

When running a tender, public buyers want clarity, consistency, and fairness. Requiring bids in the local language might seem like common sense. After all, it helps evaluation teams review documents more efficiently and reduces the risk of misinterpretation.

But is it always allowed? And what happens when international suppliers - or AI translation tools - enter the picture?

Let’s explore the rules, reasoning, and best practices behind setting language requirements in public tenders.

 

Why Language Requirements Matter in Procurement

Public procurement depends on fairness and transparency. Every supplier should be able to understand the requirements and compete on equal terms.

That’s why language matters:

• It affects who can realistically participate.

• It influences how bids are evaluated.

• It impacts auditability and compliance with national law.

A poorly defined language requirement can unintentionally exclude qualified suppliers - or lead to disputes over interpretation.

So while it’s legal to set a local language requirement, it must be done thoughtfully and in line with procurement principles.

 

What the Law Says

Under the EU Procurement Directives (and most national laws derived from them), contracting authorities have discretion to define the language of tender submissions - but with some important conditions.

The key principles are:

• Equal treatment: Language requirements must not unfairly discriminate against suppliers from other EU or EEA countries.

• Proportionality: The requirement must be reasonable and necessary for the tender’s proper evaluation.

• Transparency: The language requirement must be stated clearly in the procurement documents (often in the invitation to tender or instructions to bidders).

In practice, this means:

• You can require bids in your local or official language if justified (e.g., to ensure proper understanding during evaluation).

• You should avoid setting the language as a barrier that limits cross-border participation.

If challenged, buyers must be able to demonstrate why using the local language is necessary for the contract in question.

 

Common Approaches in Public Procurement

Different countries handle this in different ways, depending on their procurement culture and regulatory environment.

• Nordic and Baltic countries: It’s common to require bids in the national language for smaller, local tenders - but English is increasingly accepted, especially in EU-funded or cross-border contracts.
  
  

• Central Europe: Some countries allow bilingual tenders, where key documents (like pricing or summaries) must be in the local language, while technical annexes may remain in English.
  
  

• EU institutions: English, French, and German are typically accepted, with the contracting authority specifying which language will prevail in case of conflict.

The trend is clear: language flexibility is increasing, particularly for tenders involving international suppliers, digital services, or AI-enabled evaluation tools.

 

The Role of AI and Translation Tools

Until recently, language was a hard barrier. Today, AI-powered translation tools - like those embedded in modern procurement platforms - are changing that.

Buyers can now:

• Automatically translate incoming bids for review in their preferred language.

• Maintain official records in both the original and translated versions.

• Reduce exclusion of foreign suppliers without losing control over quality or accuracy.

Mercell’s own AI-supported supplier services help buyers manage multilingual submissions more effectively - ensuring that translated content remains compliant, accurate, and easy to evaluate.

However, it’s important to remember that AI translation doesn’t remove the need for legal clarity. The official submission language should still be defined, even if technology assists with translation or interpretation.

 

When It’s Reasonable to Require the Local Language

There are legitimate reasons why a public buyer might insist that bids be submitted in the local language:

• Legal precision: Contracts, certifications, and compliance statements often reference national law. Evaluating them in the local language avoids ambiguity.
  
  

• Operational clarity: Evaluation teams may not all be fluent in English, particularly in smaller municipalities or sector-specific agencies.
  
  

• Administrative ease: Simplifies document management and ensures audit readiness.

If you take this route, make sure your justification is proportional. For example, a small local construction tender may reasonably require local-language bids, while a cross-border IT project might not.

 

Best Practices for Buyers

To stay compliant and inclusive, follow these best practices when setting language requirements:

1. State the rule clearly.
   Specify the required submission language in the tender documents. Avoid vague phrasing like “local language preferred.”
   
   

2. Justify your choice.
   Explain in your documentation why this requirement is necessary (e.g., “for consistency with national safety regulations” or “to ensure accurate legal interpretation”).
   
   

3. Allow flexibility where possible.
   Consider accepting bilingual submissions - e.g., key forms in the local language, technical appendices in English.
   
   

4. Be transparent about translation.
   If you plan to use AI-assisted translation for evaluation, disclose it and ensure all bidders are treated equally.
   
   

5. Check compliance with your national rules.
   Some countries require that contracts be in the local language, but not necessarily the bids. Review your local procurement regulations to confirm.

For Suppliers: How to Handle Language Requirements

From the supplier side, language rules can feel intimidating - but they don’t have to be.

Here’s how to stay prepared:

• Always read the tender documentation carefully. The required submission language will be listed in the instructions.

• Use certified translators for official documents if needed, especially for legal or compliance sections.

• Leverage AI tools (like those available in Mercell’s platform) for initial translation and comprehension - but always review manually for accuracy.

• Plan early. Translation takes time, especially for complex technical or legal content.

Submitting in the wrong language is one of the most common - and preventable - reasons bids are disqualified.

 

How Mercell Supports Multilingual Procurement

Mercell helps public buyers and suppliers bridge language barriers without compromising compliance or transparency.

For buyers:

• Clear workflows for defining and enforcing language requirements.

• Audit-ready documentation in original and translated formats.

 

For suppliers:

• Guidance and translation support for submitting bids in the required language.

• Tools to manage templates and documents across multiple countries.
  
  

By combining compliance with accessibility, Mercell enables fairer, more efficient, and truly cross-border procurement.

 

Final Thoughts

You can require that bids be submitted in your local language - but only when it’s fair, transparent, and proportionate to the contract’s needs.

The best approach balances legal compliance with accessibility - ensuring that language rules don’t unintentionally exclude capable suppliers.

With AI and smarter procurement platforms like Mercell, public buyers no longer have to choose between clarity and inclusion. You can evaluate confidently, communicate transparently, and keep the process fair for everyone - regardless of language.